[Suggestion] Add a shadow class on v4

[jmfergeau]

Would be nice to add a class that adds shadows on specific blocks that don't have any. Something like:

.shadowed {
    filter: drop-shadow(7px 8px 0 black);
}

I tried this on a card block, a h1 block and a jumbotron block and it worked great. Doesn't work well with a list-group but well, better not put too much shadows either, eh. :p

[kristopolous]

huh interesting. it fundamentally changes the project which is to be word for word compatible with bootstrap documentation without as few additional features as possible

I like the idea for sure though. If you have code in the bs4 folder and do a PR I'll be happy to review it

[jmfergeau]

I've actually done it on the hugo theme I did based on bootstra.386 in its v3. You can see it here. I've proceeded differently by putting it only on the sideblocks because of context. (in style.css)

Knowing there's a "shadow" class already built in bootstrap 4 and 5, I'll do tries with bootstra.386 and will make a PR if i manage to make it work. It should work alright if the 386ed shadows overwrite the other bootstrap shadow classes.