You can use breakpoint infixes to set borders only from a certain breakpoint. For example border-lg will add a border to an element when the viewport is at least at the lg breakpoint.

Valid breakpoint infixes are:


Valid border classes with lg infix as example, but all infixes are valid:


Border colors are also valid to set at breakpoints, again with lg infix as example but all are valid:


Children and Grandchildren

You can use the c prefix to have the child of a given element have a border. Likewise you can use the gc prefix to affect an elements grandchildren.

Available classes are:



This can also be used for breakpoints as stated above, here using the lg infix as an example, but any valid infix will work: