<div class="dropdown">

  <button class="btn btn-primary dropdown-toggle" type="button" id="dropdownMenu4" data-toggle="dropdown"

    aria-haspopup="true" aria-expanded="false">

    Dropdown

  </button>

  <div class="dropdown-menu" aria-labelledby="dropdownMenu4">

    <a class="dropdown-item" href="#">Action</a>

    <a class="dropdown-item" href="#">Another action</a>

    <a class="dropdown-item" href="#">Something else here</a>

    <div class="dropdown-divider"></div>

    <a class="dropdown-item" href="#">Separated link</a>

  </div>

</div>