               <button class="btn btn-secondary btn-active-primary active" type="button">Active</button>
                    <button class="btn btn-secondary" type="button">Secondary</button>
                  </div>
                </div>
                <div class="card-footer">
                  <pre class="pre-scrollable"><code class="language-markup">&#x3C;!-- Source --&#x3E;
&#x3C;div class=&#x22;btn-group&#x22;&#x3E;
  &#x3C;button class=&#x22;btn btn-secondary btn-active-primary active&#x22; type=&#