Vertically centering modal-lg Bootstrap Modal makes it small - html

Question

I use modal-lg class for a large modal but when I use this SO answer to vertically center my modal it makes the modal small:
this vertical centering causes it to be small
.modal {
text-align: center;
}
#media screen and (min-width: 768px) {
.modal:before {
display: inline-block;
vertical-align: middle;
content: " ";
height: 100%;
}
}
.modal-dialog {
display: inline-block;
text-align: left;
vertical-align: middle;
}
html:
<div class="modal fade" id="result-details-modal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
<div class="modal-dialog modal-lg" role="document">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
<h4 id="result-details-title" class="modal-title"></h4>
</div>
<div class="modal-body">
...
</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>
How do I keep it large when it is vertically centered?

Answer 1

Using this little jQuery function you can do this, if that CSS is causing shrinking issue for your modal box.
Code Snippet
$(function() {
function reposition() {
var modal = $(this),
dialog = modal.find('.modal-dialog');
modal.css('display', 'block');
// Dividing by two centers the modal exactly, but dividing by three
// or four works better for larger screens.
dialog.css("margin-top", Math.max(0, ($(window).height() - dialog.height()) / 2));
dialog.css("margin-left", Math.max(0, ($(window).width() - dialog.width()) / 2));
}
// Reposition when a modal is shown
$('.modal').on('show.bs.modal', reposition);
// Reposition when the window is resized
$(window).on('resize', function() {
$('.modal:visible').each(reposition);
});
});
.center {
margin-top: 50px;
}
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script>
<div class="center">
<button data-toggle="modal" data-target="#result-details-modal" class="btn btn-primary center-block">Click Me</button>
</div>
<div class="modal fade" id="result-details-modal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
<div class="modal-dialog modal-lg" role="document">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
<h4 id="result-details-title" class="modal-title"></h4>
</div>
<div class="modal-body">
...
</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>