Dropdown
Wrap in <ot-dropdown>. Use popovertarget on the trigger and popover on the <menu>. Items use role="menuitem".
<ot-dropdown>
<button popovertarget="demo-menu" class="outline">
Options
<svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="m6 9 6 6 6-6" /></svg>
</button>
<menu popover id="demo-menu">
<button role="menuitem">Profile</button>
<button role="menuitem">Settings</button>
<button role="menuitem">Help</button>
<hr>
<button role="menuitem">Logout</button>
</menu>
</ot-dropdown>