<!-- Button trigger modal-->
  <button type="button" class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#modalDefault">
    Launch demo modal
  </button>

<!-- Modal -->
<div class="modal fade" id="modalDefault" tabindex="-1" aria-labelledby="modalTitle" aria-hidden="true">
  <div class="modal-dialog">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title" id="modalTitle">Modal title</h5>
        <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
      </div>
      <div class="modal-body">
        <p>Modal body text goes here.</p>
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-outline-secondary" data-bs-dismiss="modal">Close</button>
        <button type="button" class="btn btn-primary">Save</button>
      </div>
    </div>
  </div>
</div>

<!-- Button trigger modal-->
  <button type="button" class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#modalNoFooter">
    Modal No Footer
  </button>

<!-- Modal -->
<div class="modal fade" id="modalDefault" tabindex="-1" aria-labelledby="modalTitle" aria-hidden="true">
  <div class="modal-dialog">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title" id="modalTitle">Modal title</h5>
        <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
      </div>
      <div class="modal-body">
        <p>Modal body text goes here.</p>
      </div>
    </div>
  </div>
</div>

<div class="modal-dialog modal-xl">...</div>
<div class="modal-dialog modal-lg">...</div>
<div class="modal-dialog modal-sm">...</div>