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Add .modal-dialog-centered for optional vertically centered modal (#24510)

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* Add .modal-dialog-centered for optional vertically cenetered modal

Fixes #23638

* adds modal-dialog-centered class to docs and removes margin to avoid generating a vertical scrolling

* mention limitations

* fix aria attr

* Add `width: 100%` to the .modal-content for the centered version. Adding it here to avoid adding another selector by limiting it to the centered modal modifier.
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Mark Otto 2017-10-29 15:14:10 -07:00 committed by GitHub
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58
docs/4.0/components/modal.md
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@ -208,6 +208,64 @@ When modals become too long for the user's viewport or device, they scroll indep
</div>
{% endhighlight %}
### Vertically centered
Add `.modal-dialog-centered` to `.modal-dialog` to vertically center the modal. **Do not use this with long modals**—it will overflow the viewport and potentially hide parts of your modal.
<div id="exampleModalCenter" class="modal fade" tabindex="-1" role="dialog" aria-labelledby="exampleModalCenterTitle" aria-hidden="true">
<div class="modal-dialog modal-dialog-centered" role="document">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title" id="exampleModalCenterTitle">Modal title</h5>
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">&times;</span>
</button>
</div>
<div class="modal-body">
<p>Cras mattis consectetur purus sit amet fermentum. Cras justo odio, dapibus ac facilisis in, egestas eget quam. Morbi leo risus, porta ac consectetur ac, vestibulum at eros.</p>
</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>
<div class="bd-example">
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModalCenter">
Launch demo modal
</button>
</div>
{% highlight html %}
<!-- Button trigger modal -->
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModalCenter">
Launch demo modal
</button>
<!-- Modal -->
<div class="modal fade" id="exampleModalCenter" tabindex="-1" role="dialog" aria-labelledby="exampleModalCenterTitle" aria-hidden="true">
<div class="modal-dialog" 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">&times;</span>
</button>
</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>
{% endhighlight %}
### Tooltips and popovers
[Tooltips]({{ site.baseurl }}/docs/{{ site.docs_version }}/components/tooltips/) and [popovers]({{ site.baseurl }}/docs/{{ site.docs_version }}/components/popovers/) can be placed within modals as needed. When modals are closed, any tooltips and popovers within are also automatically dismissed.

15
scss/_modal.scss
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@ -50,11 +50,20 @@
}
}
.modal-dialog-centered {
display: flex;
align-items: center;
height: 100%;
margin-top: 0;
margin-bottom: 0;
}
// Actual modal
.modal-content {
position: relative;
display: flex;
flex-direction: column;
width: 100%; // Ensure `.modal-content` extends the full width of the parent `.modal-dialog`
// counteract the pointer-events: none; in the .modal-dialog
pointer-events: auto;
background-color: $modal-content-bg;
@ -144,11 +153,17 @@
margin: $modal-dialog-margin-y-sm-up auto;
}
.modal-dialog-centered {
margin-top: 0;
margin-bottom: 0;
}
.modal-content {
@include box-shadow($modal-content-box-shadow-sm-up);
}
.modal-sm { max-width: $modal-sm; }
}
@include media-breakpoint-up(lg) {