// bootstrap 에서 필요한 부분만 가져와서 import, 프로젝트를 경량화 시킨다.

$ npm i @popperjs/core

import button from 'bootstrap/js/dist/button';
import Modal from 'bootstrap/js/dist/modal';

new Modal(document.querySelector('#exampleModal'), {
  backdrop: 'static', // 배경을 누르면 모달을 꺼주는데 static 을 주면 꺼지지 않는다.
});

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

  <!-- Modal -->
  <div class="modal fade" id="exampleModal" 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">...</div>
        <div class="modal-footer">
          <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">
            Close
          </button>
          <button type="button" class="btn btn-primary">Save changes</button>
        </div>
      </div>
    </div>
  </div>