ng2-bootstrap-base-modified/demo/src/app/components/+accordion/demos/one-at-a-time/one-at-a-time.html

Native Angular Bootstrap Components Typeahead modified

<div class="checkbox">
  <label>
    <input type="checkbox" [(ngModel)]="oneAtATime">
    Open only one at a time
  </label>
</div>

<accordion [closeOthers]="oneAtATime">
  <accordion-group heading="Header">
    This content is straight in the template.
  </accordion-group>
  <accordion-group heading="Content 1">
    <p>Content 1</p>
  </accordion-group>
  <accordion-group heading="Content 2">
    <p>Content 2</p>
  </accordion-group>
</accordion>