Bootstrap is a front-end framework which means that you can build anything you want aslong as you know how to use Bootstrap.
I actually made it only possible to use it in Xenforo 2 too.
The demo page is actually copied from the internet, just to show that it works.
You checkout their website for...
Hi @Nirjonadda ,
This add-on makes it possibles to use Bootstrap 4 in your pages or template's and styles.
So this means that if you do not have anything in your pages that uses Bootstrap 4, you will not see any changes untill you use the Bootstrap classes.