How can add a new breakpoint that same as md?

Created by: aboutjquery

Hello, i would like to add a new breakpoint call break at the end of the map, the breakpoint map will be.

$grid-breakpoints: ( xs: 0, sm: 544px, md: 768px, lg: 992px, xl: 1200px, break: 768 // place this key after xl ) !default;

break is just same as md, i try edit this with sass, seem that breakpoint-down mixin not work correctly with above map.

Any way to make this map work with breakpoint-down mixin?

Thank you so much.