bootstrap dropdown
<!-- Bootstrap 5 Dropdown -->
<div class="dropdown">
<button
class="btn btn-secondary dropdown-toggle"
type="button"
id="dropdownMenuButton1"
data-bs-toggle="dropdown"
aria-expanded="false"
>
Dropdown button
</button>
<ul class="dropdown-menu" aria-labelledby="dropdownMenuButton1">
<li><a class="dropdown-item" href="#">Action</a></li>
<li><a class="dropdown-item" href="#">Another action</a></li>
<li><a class="dropdown-item" href="#">Something else here</a></li>
</ul>
</div>