Leverage scrollbars

[cmdalbem]

Congrats for the work and thanks for sharing with the community! :) This is a really interesting idea for a component, that I've seen myself reimplement in a couple of projects already. However I noticed it doesn't handle well the case where scrollbars are visible, which would be a common case whenever the user has a mouse attached in a Mac, and probably even more common in Windows or other OS.

[dmackerman]

Yeah, not entirely sure why this library is called scroll-shadow when it doesn't actually use shadows or masking. 🤷