Autofocus Input Element on Modal Open Bootstrap 4 - input

Question

I am trying to autofocus input element on bootstrap 4 modal open . I have tried below code from http://getbootstrap.com/docs/4.0/components/modal/ but this is not working.
Can someone help me to give working demo
$('#myModal').on('shown.bs.modal', function () {
$('#myInput').trigger('focus')
})

Answer 1

Try the snippet below. Perhaps you need $(document).ready()
$(document).ready(function() {
$('#myModal').on('shown.bs.modal', function() {
$('#myInput').trigger('focus');
});
});
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" />
<!-- Button trigger modal -->
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#myModal">
Launch demo modal
</button>
<!-- Modal -->
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
<div class="modal-dialog" role="document">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title" id="exampleModalLabel">Modal title</h5>
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
</div>
<div class="modal-body">
<input type="text" class="form-control" id="myInput">
</div>
<div class="modal-footer">
<button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
<button type="button" class="btn btn-primary">Save changes</button>
</div>
</div>
</div>
</div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>

Answer 2

I am also use this code
<script>
function setFocus(){
$('#searchModal').on('shown.bs.modal', function () {
$('#q').focus();
});
}
</script>
Where #searchModal is modal div ID and #q is input element ID
Use this code in button
<button type="button" onclick="setFocus()">Open Modal</button>