Aligning angular bootstrap modal window in the center vertically

Is there a way to vertically center a modal window on the screen, regardless of the size of the content being displayed? I'm currently using an image as a modal window in my page, and while I was able to align it horizontally, I'm struggling to get it centered vertically. Any suggestions or examples of how this can be achieved?

I tried following this example: modal window demo plunker

However, the actual content of my modal window looks like this:

<script type="text/ng-template" id="myModalContent.html">
        <div>
             <img class= "attachmentImage" src={{items}} />
        </div>
</script>

Should I make changes in bootstrap.min.css or ui-bootstrap-tpls-0.13.0.js, or is it better to handle this with my own stylesheet?

Thank you for your assistance. Please let me know if more information is needed.

cssangularjstwitter-bootstrapbootstrap-modalangular-bootstrap

Answer №1

I have a different viewpoint from 1Bladesforhire's response because I believe that when the height of the modal container exceeds the viewport height, it creates an accessibility challenge at the top. This issue often arises when centering taller child elements within parent containers using the vertical centering method with absolute.

For me, the most effective approach to vertically centering a Bootstrap modal involves:

.modal-dialog {
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow-y: auto;
  min-height: calc(100vh - 60px);
}
@media (max-width: 767px) {
  .modal-dialog {
    min-height: calc(100vh - 20px);
  }
}

/* The above CSS is essential for centering. The following code centers the modal trigger button */

body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}
<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://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>

<button type="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">
  <div class="modal-dialog" 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">&times;</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>

Even when the height of .modal-content is set to 300vh, it remains fully accessible and centered within the viewport:

.modal-dialog {
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow-y: auto;
  min-height: calc(100vh - 60px);
}
@media (max-width: 767px) {
  .modal-dialog {
    min-height: calc(100vh - 20px);
  }
}

/* The above CSS is necessary for centering. The code below centers the modal trigger button */

.modal-content {
  height: 300vh;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}
<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://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>

<button type="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">
  <div class="modal-dialog" 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">&times;</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>

Answer №2

If you're using Angular Bootstrap, you may already have access to this feature. Give it a try to see if it resolves your issue.

For more information, refer to:

Check out the code in component.ts and component.html below:

import { NgbModal } from '@ng-bootstrap/ng-bootstrap';

constructor(private modalService: NgbModal) { }

open(content: any, account_no: string) {
    this.modalService.open(content, { centered: true, size: 'xl' });
}
<ng-template #content let-c="close" let-d="dismiss">
    <div class="modal-header">
        <h4 class="modal-title" id="modal-basic-title">Modal Title</h4>
        <button type="button" class="btn-close" aria-label="Close" (click)="d('Cross click')"></button>
    </div>
    <div class="modal-body">
        Content Area
        </div>
</ng-template>

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