بستن مودال در بوت استرپ با جاوا اسکریپت خام

<!-- HTML for modal -->
<div class="modal fade" id="myModal" tabindex="-1" aria-labelledby="exampleModalLabel" aria-hidden="true">
 <div class="modal-dialog">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title" id="exampleModalLabel">Modal title</h5>
        <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>     
      </div>
      <div class="modal-body">
        Modal body content
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Close</button>
      </div>
    </div>
  </div>
</div>
<!-- Button to trigger modal -->
<button type="button" class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#myModal">
  Launch demo modal
</button>

// JavaScript to close modal
document.getElementById('myModal').classList.remove('show');
document.querySelector('#myModal').style.display = 'none';
document.querySelector('#myModal').setAttribute('aria-hidden', 'true');
document.body.classList.remove('modal-open');
document.querySelector('.modal-backdrop').remove();