Add Direction to Utility Classes?

[naher94]

Is there a way to update this do also do “down” like the breakpoint mixin?

Responsive utility classes
Unprefixed classes apply at all sizes; prefixed classes apply at that breakpoint and above.

<!-- Full width by default, half at md and up -->
<div class="scaffold-grid-span-full md:scaffold-grid-span-half">...</div>

<!-- Stacked on mobile, row at md and up -->
<div class="scaffold-flex scaffold-flex-col md:scaffold-flex">...</div>