Bootshadow is a customisable dark theme for bootstrap 4 components
You can use Bootshadow the same way you usually use Boostrap 4, since this theme uses the same html classes name than Bootstrap.
All you have to do is to replace
bootshadow.css ( or
bootshadow.min.css) in your html page. You do not need to include bootstrap's css file, it is already imported in Bootshadow.
However, Bootshadow doesn't include bootstrap's JS scripts, so you will have to import them separetly if needed.
Happy coding !
Check an exemple of Bootshadow's components right here !
Here are some screenshots of differents bootstrap components styled by bootshadow :