Custom Sizing for Bootstrap Modals

I need assistance with creating a dynamic bootstrap modal that adjusts its width based on the content and includes a vertical scrollbar when needed.

Although the vertical scrollbar is functioning correctly, the horizontal width appears to be static. Can someone provide guidance on how to fix this issue?

Modal:

<div class="modal" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModal">
  <div class="modal-dialog">
    <div class="modal-content">
      <div class="modal-header"><h4 class="modal-title">Dynamic Modal Title</h4></div>
      <div class="modal-body">Dynamic Modal Body</div>
      <div class="modal-footer">Dynamic Modal Footer</div>
    </div><!-- /.modal-content -->
  </div><!-- /.modal-dialog -->
</div><!-- /.modal -->

CSS:

.modal .modal-body { /* Vertical scrollbar if necessary */
    max-height: 480px;
    overflow-y: auto;
}

body .modal-dialog { /* Width */
    max-width: 100%;
}
csstwitter-bootstrap

Answer №1

Inline-block elements automatically adjust their width based on the content inside.

body .modal-dialog { /* Width */
    max-width: 100%;
    width: auto !important;
    display: inline-block;
}

Note: Using width: auto !important; is necessary to override the default Bootstrap styles. To center the element in the middle of the viewport, use display: flex; on the parent element.

.modal {
  z-index: -1;
  display: flex !important;
  justify-content: center;
  align-items: center;
}

.modal-open .modal {
   z-index: 1050;
}

Answer №2

@tmg's solution is tailored for Bootstrap 3. However, if you are using Bootstrap 4, consider the following CSS:

.modal {
    text-align: center;
}

In addition to his recommendation:

.modal-dialog {
    text-align: left; /* this adjustment may be necessary */
    max-width: 100%;
    width: auto !important;
    display: inline-block;
}

Answer №3

Utilizing the value <em>fit-content</em> proved to be effective for my situation, as it did not cause any unwanted issues such as a misaligned modal.</p>

<pre><code>.modal {
    padding: 1%;
}
.modal-lg {
    min-width: auto;
    max-width: fit-content;
}

Answer №4

Here is a solution that works perfectly with Bootstrap 5:

.modal-dialog {
    max-width: fit-content;
    margin-left: auto;
    margin-right: auto;
}

Check out the Fiddle here

It's important to note that the margin styles mentioned are specifically for iOS Safari. For all other platforms tested, using fit-content alone should be sufficient.

Answer №5

Bootstrap 4 Compatibility

In this code snippet, I have implemented a minimum width of 300px and a maximum width of 90vw for a modal. The modal is designed to allow vertical scrolling using the screen scrollbar, and a horizontal scrollbar will appear if the content width exceeds 90vw.

.modal-dialog {
  position: relative;
  display: table;
  overflow: auto;
  width: auto;
  min-width: 300px;
}
.modal-body { /* Set Modal width limit to 90% */
  overflow-x: auto !important;
  max-width: 90vw !important;
}

Answer №6

I specifically required it for modal-lg and modal-xl. Here is the solution I came up with:

@media (min-width: 576px) {
  .modal-dialog.modal-xl{
    max-width: min( 90vw, 1200px ) !important;
  }
  .modal-dialog.modal-lg{
    max-width: min( 90vw, 900px ) !important;
  }
}

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