<div class="toast align-items-center text-white {{ 'bg-success' if success else 'bg-danger' }} border-0" role="alert"
  aria-live="assertive" aria-atomic="true" style="position: fixed; bottom: 20px; right: 20px; z-index: 1000;">
  <div class="d-flex">
    <div class="toast-body">
      {{ message }}
    </div>
    <button type="button" class="btn-close btn-close-white me-2 m-auto" data-bs-dismiss="toast"
      aria-label="Close"></button>
  </div>
</div>

<script>
  var toastElList = [].slice.call(document.querySelectorAll('.toast'))
  var toastList = toastElList.map(function (toastEl) {
    return new bootstrap.Toast(toastEl)
  })
  toastList.forEach(toast => toast.show());
</script>