A Media Breakpoint Mixin can be used to define custom responsive behaviour dependent on the screen size.
The bootstrap media-breakpoint mixins take breakpoint names as parameters (e.g. xs, sm, md, lg, xl).
The css code is only included when the screen size is greater than the width of the breakpoint.
media-breakpoint-down(bp)
The css code is only included when the screen size is less than the width of the breakpoint.
media-breakpoint-between(sm, lg)
The css code is only included when the screen size is between the widths of the breakpoints.
@include media-breakpoint-up('lg'){
margin-bottom: 0;
}
You can also define your own media queries and can learn more at SCSS mixins here.