title: How to add Bootstrap Accordion to Angular app
body: <p>I'm trying to add an Bootstrap Accordion to my Angular app below:</p>
  
  <pre><code>&lt;div class="accordion" id="accordionExample"&gt;
      &lt;div class="card"&gt;
          &lt;div class="card-header" id="headingOne"&gt;
              &lt;h5 class="mb-0"&gt;
                  &lt;button class="btn btn-link" type="button" data-toggle="collapse" data-target="#collapseOne" aria-expanded="true" aria-controls="collapseOne"&gt;
                      Collapsible Group Item #1
                  &lt;/button&gt;
              &lt;/h5&gt;
          &lt;/div&gt;
  
          &lt;div id="collapseOne" class="collapse show" aria-labelledby="headingOne" data-parent="#accordionExample"&gt;
              &lt;div class="card-body"&gt;
                  Anim
              &lt;/div&gt;
          &lt;/div&gt;
      &lt;/div&gt;
  
      &lt;div class="card"&gt;
          &lt;div class="card-header" id="headingTwo"&gt;
              &lt;h5 class="mb-0"&gt;
                  &lt;button class="btn btn-link collapsed" type="button" data-toggle="collapse" data-target="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo"&gt;
                      Collapsible Group Item #2
                  &lt;/button&gt;
              &lt;/h5&gt;
          &lt;/div&gt;
          &lt;div id="collapseTwo" class="collapse" aria-labelledby="headingTwo" data-parent="#accordionExample"&gt;
              &lt;div class="card-body"&gt;
              Anim
              &lt;/div&gt;
          &lt;/div&gt;
      &lt;/div&gt;
  
      &lt;div class="card"&gt;
          &lt;div class="card-header" id="headingThree"&gt;
              &lt;h5 class="mb-0"&gt;
                  &lt;button class="btn btn-link collapsed" type="button" data-toggle="collapse" data-target="#collapseThree" aria-expanded="false" aria-controls="collapseThree"&gt;
                      Collapsible Group Item #
                  &lt;/button&gt;
              &lt;/h5&gt;
          &lt;/div&gt;
          &lt;div id="collapseThree" class="collapse" aria-labelledby="headingThree" data-parent="#accordionExample"&gt;
              &lt;div class="card-body"&gt;
                  Anim
              &lt;/div&gt;
          &lt;/div&gt;
      &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>I ran the following NPM installations before building:</p>
  
  <blockquote>
    <p>npm i bootstrap</p>
    
    <p>npm i ngx-bootstrap</p>
  </blockquote>
  
  <p>But when I click on one of the Accordion Titles, nothing is happening.
  Can someone please tell me what piece of the set up I'm missing? Thanks a lot!</p>