[xcatliu]

Thanks for your feedback.

Actually Bootstrap v4 provides an opinion to use flex box instead of the traditional grid. http://v4-alpha.getbootstrap.com/getting-started/flexbox/

I would say your suggestion is good. I don't have a convincing reason that `container-side` being a part of the framework. I'll consider to remove it.

What kind of content is never visible on mobile? `Scan the QRCode to view on mobile` and `Go to top` is a kind of this content.

Why does it have to be on the side? I think it's a good design to guide people to view on mobile. Or where do you think it can be?

Thanks!

[sleazebreeze]

Apologies for the tone in my previous comment. I guess it came off pretty harsh. Good work on creating and releasing something to the public. Upon looking again today, I like the overall approach you've taken and it seems very reasonable.

The `container-side` thing just feels very opinionated to me. I'm not sure it belongs in a framework, but that's totally your call.