Missing visible-** and hidden-** in Bootstrap v4

Question

In Bootstrap v3 I often use the hidden-** classes combined with clearfix to control multi column layouts at different screen widths. For example,

I could combine mu

Answer 1

http://v4-alpha.getbootstrap.com/layout/responsive-utilities/

You now have to define the size of what is being hidden as so

.hidden-xs-down

Will hide anythinging from xs and smaller, only xs

.hidden-xs-up

Will hide everything