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

Bootstrap v4.1 uses new classnames for hiding columns on their grid system.

For hiding columns depending on the screen width, use d-none class or any of the d-{sm,md,lg,xl}-none classes. To show columns on certain screen sizes, combine the above mentioned classes with d-block or d-{sm,md,lg,xl}-block classes.

Examples are:

hide on screens wider than lg
hide on screens smaller than lg

More of these here.