[](https://raw.githubusercontent.com/coliff/bootstrap-ie8/master/LICENSE)
[](https://www.paypal.me/coliff)
[](https://www.npmjs.com/package/bootstrap-ie8)
[](https://www.jsdelivr.com/package/gh/coliff/bootstrap-ie8)
[](https://github.com/coliff/bootstrap-ie8)
[](https://github.com/prettier/prettier)
# Bootstrap 4 for IE8 and IE9
Bootstrap 4 drops support for Internet Explorer 8 and 9, but you can add it back by simply adding a conditional statement targeting IE 8 and 9 with a CSS file and a CDN-hosted JavaScript file to polyfill HTML5 element support.
### Quick start
Several quick start options are available:
- [Download the latest release](https://github.com/coliff/bootstrap-ie8/archive/v4.3.1.zip)
- Clone the repo `git clone https://github.com/coliff/bootstrap-ie8.git`
- Install with [npm](https://www.npmjs.com/package/bootstrap-ie8) `npm install bootstrap-ie8`
- Install with [yarn](https://yarnpkg.com/en/package/bootstrap-ie8) `yarn add bootstrap-ie8`
- Install with [Composer](https://getcomposer.org/) `composer require coliff/bootstrap-ie8:4.3.1`
### Usage
1. Add `` to the top of the of your page
2. Add the following conditional statements to the `` of your page but after the Bootstrap 4 CSS:
```html
```
#### Optional JavaScript Fix
To fix the dropdown menus and modals you can add the following to the footer:
```html
```
This will load jQuery, PopperJS and Bootstrap as normal on all browsers other than IE8.
IE9 will load the `bootstrap-ie9.js` script.
IE8 will load the latest compatible version of jQuery, the unminified Bootstrap JS (the minified version causes an error) and the `bootstrap-ie8.js` fix.
### FAQS
**Q. What does this fix/polyfill?**
A. Internet Explorer 9 doesn't support flexbox so there is a float-based layout fallback and a couple of other minor fixes. Internet Explorer 8 doesn't support rem units so all units are specified in pixels. Media Queries are also not supported so IE8 has a fixed-width layout (min-width 998px).
**Q. Is the CSS hosted on a CDN?**
A. Yes, thanks to [JSDelivr](https://www.jsdelivr.com/package/gh/coliff/bootstrap-ie8?path=css) minified versions are available with the direct links:
- https://cdn.jsdelivr.net/gh/coliff/bootstrap-ie8/css/bootstrap-ie8.min.css
- https://cdn.jsdelivr.net/gh/coliff/bootstrap-ie8/css/bootstrap-ie9.min.css
**Q. Will you provide LESS/SASS files?**
A. Maybe in a future release I'll provide SASS file (with comments).
**Q. Do I need the RespondJS polyfill for IE8 like Bootstrap 3 uses?**
A. No. Instead the CSS is set to be fixed-width which makes things a lot easier. You don't need to change your HTML markup, the CSS will take care of it as the (min-width:992px) media queries are all set.
**Q. Where can I see a demo?**
A. Right here: [http://coliff.github.io/bootstrap-ie8/test.htm](http://coliff.github.io/bootstrap-ie8/test.htm)
**Q. I don't have access to IE8/IE9 browser to test- how can I see how my site appears?**
A. You could use my free [Multi-Browser Screenshots Chrome Extension](https://chrome.google.com/webstore/detail/multi-browser-screenshots/dhaknibfbngnmflbejdkliedmjmbjojk) to see screenshots of any webpage.
### Known Issues
- View a list of known issues at [https://github.com/coliff/bootstrap-ie8/issues](https://github.com/coliff/bootstrap-ie8/issues)