Angular 6模板+ Bootstrap 4 Accordian无法正常工作

Question

我正在尝试让Bootstrap 4 Accordian组件在Angular 6模板中工作。 “折叠”和“显示”将不起作用。我知道还有另一种使用ng-bootstrap中的ngbCollapse指令的实现，但是我不能使用该实现。 ngbTemplate标记是只读的，我想在此处添加输入文本区域。因此，我想使用原始的实现本身。

我只是将Accordian示例中的代码复制并粘贴到模板中，即使这样也不起作用。单击链接以展开或折叠时，没有任何反应。

我的代码：

  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css">
<div id="accordion">
<div class="card">
  <div class="card-header" id="headingOne">
    <h5 class="mb-0">
      <button class="btn btn-link" data-toggle="collapse" data-target="#collapseOne" aria-expanded="true" aria-controls="collapseOne">
        Collapsible Group Item #1
      </button>
    </h5>
  </div>

  <div id="collapseOne" class="collapse show" aria-labelledby="headingOne" data-parent="#accordion">
    <div class="card-body">
      Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.
    </div>
  </div>
</div>
<div class="card">
  <div class="card-header" id="headingTwo">
    <h5 class="mb-0">
      <button class="btn btn-link collapsed" data-toggle="collapse" data-target="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo">
        Collapsible Group Item #2
      </button>
    </h5>
  </div>
  <div id="collapseTwo" class="collapse" aria-labelledby="headingTwo" data-parent="#accordion">
    <div class="card-body">
      Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.
    </div>
  </div>
</div>

        

还有其他人对此有疑问吗？有什么想法吗？

谢谢。