Bootstrap modal not showing properly centered - html

Question

screenshot of the page
Hi, i'm losing my head trying to figure it out why this modal is shown like this. The code i followed was copied from the bootstrap website.
Here it is
<button type="button" class="btn btn-info btn-lg" (click)="showPerformedActivityModal()">Show Performed Activities</button>
<!--Modal -->
<div class="container">
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalCenterTitle" aria-hidden="true"
[ngStyle]="{'display': myModalIsOpen ? 'block' : 'none', 'opacity': 5}">
<div class="modal-dialog modal-dialog-centered" role="document">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title" id="exampleModalLongTitle">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">
<app-table [config]="config" [columns]="columns" [entity]="entity" [sort]="sort" [sortOrder]="sortOrder">
</app-table>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-primary" (click)="refreshResources()">Select Activities</button>
<button type="button" class="btn btn-default" (click)="closeModal()">Close</button>
</div>
</div>
</div>
</div>
</div>

Answer 1

This does the job : http://jsfiddle.net/sRmLV/1140/
You need to use new DIV and custom CSS, change the class 'modal-dialog-centered' by 'vertical-align-center'
HTML
<button class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">Launch demo modal</button>
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
<div class="vertical-alignment-helper">
<div class="modal-dialog vertical-align-center">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal"><span aria-hidden="true">×</span><span class="sr-only">Close</span></button>
<h4 class="modal-title" id="myModalLabel">Modal title</h4>
</div>
<div class="modal-body">...</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
<button type="button" class="btn btn-primary">Save changes</button>
</div>
</div>
</div>
</div>
</div>
CSS
.vertical-alignment-helper {
display:table;
height: 100%;
width: 100%;
pointer-events:none;}
.vertical-align-center {
/* To center vertically */
display: table-cell;
vertical-align: middle;
pointer-events:none;}
.modal-content {
/* Bootstrap sets the size of the modal in the modal-dialog class, we need to inherit it */
width:inherit;
max-width:inherit; /* For Bootstrap 4 - to avoid the modal window stretching
full width */
height:inherit;
/* To center horizontally */
margin: 0 auto;
pointer-events:all;}