Close modal with second button in Bootstrap 4 - html

Question

I open a modal with the normal Boostrap 4 method.
It works and I can open and close the modal.
But in my case I need a second button the close the modal. A simple copy of the first button wouldn't work.
I tried the following code:
$('#sitenav_close').trigger('click.dismiss.bs.modal')
It doesn't work either.
Is there any other method to close a modal with a second button?

Answer 1

In Bootstrap 4.x, you can manually close a modal with the .modal('hide') method.
<!-- my modal -->
<div class="modal" id="myModal">
...
<!-- my alternate close button -->
<button id="altCloseButton">Alternate close</button>
...
</div>
<script>
// close myModal when my alternate close button is clicked
const altBtn = document.getElementById("altCloseButton");
altBtn.onclick = () => $('#myModal').modal('hide');
</script>
However, if all you need is a duplicate close button, this is unnecessary, as shown below:
<!-- required Bootstrap resources -->
<link href="https://cdn.jsdelivr.net/npm/bootstrap#4.6.0/dist/css/bootstrap.min.css" rel="stylesheet" />
<script src="https://code.jquery.com/jquery-3.5.1.slim.min.js" integrity="sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap#4.6.0/dist/js/bootstrap.bundle.min.js" integrity="sha384-Piv4xVNRyMGpqkS2by6br4gNJ7DXjqk09RmUpJ8jgGtD7zP9yug3goQfGII0yAns" crossorigin="anonymous"></script>
<!-- Button trigger modal -->
<button type="button" class="btn btn-primary m-2" data-toggle="modal" data-target="#exampleModal">
Open demo modal
</button>
<!-- Modal -->
<div class="modal fade" id="exampleModal" tabindex="-1">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title"><small>.modal-title</small></h5>
</div>
<div class="modal-body">
.modal-body
</div>
<div class="modal-footer">
<!-- three identical close buttons -->
<button type="button" class="btn btn-secondary" data-dismiss="modal">Close 1</button>
<button type="button" class="btn btn-secondary" data-dismiss="modal">Close 2</button>
<button type="button" class="btn btn-secondary" data-dismiss="modal">Close 3</button>
</div>
</div>
</div>
</div>