<div id="app">
<!-- Button trigger modal -->
<button type="button" class="btn btn-primary" id="modalBtn">
Launch demo modal
</button>
<!-- Modal -->
<!-- Modal -->
<div class="modal fade" id="modal" tabindex="-1" aria-labelledby="exampleModalLabel" aria-hidden="true">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<h1 class="modal-title fs-5" id="exampleModalLabel">Modal title</h1>
<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>
//擷取dom
const modalBtn = document.querySelector("#modalBtn");
const modal = document.querySelector("#modal");
//實體化,產生modal真的實體myModal
const myModal = new bootstrap.Modal(modal);
//我們打算在畫面一進入的時候,就把modal打開來可以使用.show()
// myModal.toggle();
// myModal.show();
modalBtn.addEventListener("click", function () {
myModal.show();
});