<tab-container data-view-component="true">
  <div data-view-component="true" class="tabnav">
    <ul role="tablist" aria-label="label" data-view-component="true" class="tabnav-tabs">
      <li role="presentation" data-view-component="true" class="d-inline-flex">
        <button id="tab-1" type="button" role="tab" aria-controls="panel-tab-1" aria-selected="true" data-view-component="true" class="tabnav-tab">
          <span data-view-component="true">Tab 1</span>
        </button></li>
      <li role="presentation" data-view-component="true" class="d-inline-flex">
        <button id="tab-2" type="button" role="tab" aria-controls="panel-tab-2" data-view-component="true" class="tabnav-tab">
          <span data-view-component="true">Tab 2</span>
        </button></li>
      <li role="presentation" data-view-component="true" class="d-inline-flex">
        <button id="tab-3" type="button" role="tab" aria-controls="panel-tab-3" data-view-component="true" class="tabnav-tab">
          <span data-view-component="true">Tab 3</span>
        </button></li>
    </ul>
        <button type="button" data-view-component="true" class="Button--secondary Button--medium Button">  <span class="Button-content">
        <span class="Button-label">Extra Button</span>
      </span>
    </button>
  </div>
    
  <div id="panel-tab-1" role="tabpanel" tabindex="0" aria-labelledby="tab-1" data-view-component="true">Panel 1</div>
  <div id="panel-tab-2" role="tabpanel" tabindex="0" hidden="hidden" aria-labelledby="tab-2" data-view-component="true">Panel 2</div>
  <div id="panel-tab-3" role="tabpanel" tabindex="0" hidden="hidden" aria-labelledby="tab-3" data-view-component="true">Panel 3</div>
</tab-container>