Bootstrap 5 Support for Internet Explorer 11

Bootstrap 5 drops support for Internet Explorer 11, but you can add support again simply by adding a CSS file and a few multiple JavaScript packages.

What does this fix/polyfill?

Workaround for the SVG overflow bug
Remove the default vertical scrollbar from textarea
Correct the text-wrapping and color inheritance for legend
Disable auto-hiding scrollbar to avoid overlap on pre
Fixes for card image size bug
Fixes for text color and text opacity utility classes
Improved layout for justify-content-evenly flex utility
Fixes for stacks gap spacing
Add the correct display values for template and main
Fixes for modals (.modal-dialog-centered and .modal-dialog-scrollable)
Fixes for forms (inputs, checkboxes, radio buttons, switches, selects, ranges, placeholders, and floating labels)
Fix for the btn-close-white SVG icon color
Fix for dark carousel previous and next SVG icon colors
Fix for valid-tooltip & invalid-tooltip positioning
Adds vendor prefixes for user-select-auto and user-select-none utilities
Fix for .visually-hidden utility class
Fix for vertical rule .vr class
Bootstrap 5 Beta 2 is loaded via CDN (The JavaScript in Bootstrap 5 Beta 3 and later is incompatible)
Polyfill for CSS custom properties (ie11CustomProperties)
Polyfill to fix most JavaScript components (Polyfill.io)
Polyfill to fix tabs (element-qsa-scope polyfill)
Fixes for Accordion button icons
Fix for border utility classes

Must Read: Javascript Library to Make HMTL Editable Tables with Bootstrap | Bootstable

Bootstrap Support for Internet Explorer Details

Post Name	Bootstrap 5 IE11
Author Name	coliff
Category	Bootstrap
Official Page	Click Here
Official Website	github.com
Publish Date	October 1, 2020
Last Update	July 17, 2023
Download	Link Below
License	MIT

How to make use of it:

1. Load the Bootstrap 5 framework.

<!-- Bootstrap 5 core CSS -->
<link rel="stylesheet" href="/path/to/cdn/bootstrap.min.css" />

<!-- Bootstrap 5 core JavaScript -->
<script src="/path/to/cdn/popper.min.js"></script>
<script src="/path/to/cdn/bootstrap.min.js"></script>

2. Add the next JavaScript snippet to the head part of the document.

<script>window.MSInputMethodContext && document.documentMode && document.write('<link rel="stylesheet" href="/css/bootstrap-ie11.min.css"><script src="https://code.jquery.com/jquery-3.5.1.slim.min.js"><\/script><script src="//stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js"><\/script><script src="//cdn.jsdelivr.net/gh/nuxodin/[email protected]/ie11CustomProperties.min.js"><\/script>');</script>