在Bootstrap下拉菜单中显示平滑滑块

<div class="dropdown">
  <button class="btn btn-primary dropdown-toggle" type="button" id="dropdownMenuButton" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
    下拉菜单
  </button>
  <div class="dropdown-menu" aria-labelledby="dropdownMenuButton">
    <!-- 下拉菜单选项 -->
  </div>
</div>

<a class="dropdown-item" href="#">选项1</a>
<a class="dropdown-item" href="#">选项2</a>
<a class="dropdown-item" href="#">选项3</a>

<div class="dropdown-menu" aria-labelledby="dropdownMenuButton">
  <div id="carouselExampleIndicators" class="carousel slide" data-ride="carousel">
    <!-- 平滑滑块内容 -->
  </div>
</div>

<div id="carouselExampleIndicators" class="carousel slide" data-ride="carousel">
  <div class="carousel-inner">
    <div class="carousel-item active">
      <img src="slide1.jpg" class="d-block w-100" alt="滑块1">
    </div>
    <div class="carousel-item">
      <img src="slide2.jpg" class="d-block w-100" alt="滑块2">
    </div>
    <div class="carousel-item">
      <img src="slide3.jpg" class="d-block w-100" alt="滑块3">
    </div>
  </div>
</div>

<div id="carouselExampleIndicators" class="carousel slide" data-ride="carousel">
  <!-- 滑块内容 -->
  <a class="carousel-control-prev" href="#carouselExampleIndicators" role="button" data-slide="prev">
    <span class="carousel-control-prev-icon" aria-hidden="true"></span>
    <span class="sr-only">上一个</span>
  </a>
  <a class="carousel-control-next" href="#carouselExampleIndicators" role="button" data-slide="next">
    <span class="carousel-control-next-icon" aria-hidden="true"></span>
    <span class="sr-only">下一个</span>
  </a>
</div>