Navbar dropdown menu

<!-- Source -->
<nav class="navbar navbar-expand-xs navbar-dark bg-dark px-0">
  <div class="container-fluid navbar-container">
  <a class="navbar-brand" href="#">Navbar</a>
    <div class="collapse navbar-collapse">
      <ul class="navbar-nav">
        <li class="nav-item dropdown">
		<a class="nav-link dropdown-toggle" href="#" data-toggle="dropdown">Dropdown</a>
          <div class="dropdown-menu navbar-dropdown-menu">
		  <a class="dropdown-item" href="#">Menu item 1</a>
		  <a class="dropdown-item" href="#">Menu item 2</a>
		  <a class="dropdown-item" href="#">Menu item 3</a>
          </div>
        </li>
      </ul>
    </div>
  </div>
</nav>