Breakpoints 
Available breakpoints 
| Breakpoint | Class infix | Dimensions | 
|---|---|---|
| Small | sm | ≥ 576px | 
| Medium | md | ≥ 768px | 
| Large | lg | ≥ 992px | 
| Extra large | xl | ≥ 1200px | 
Media queries 
This function is used to find the breakpoint dimension. It's possible to use a custom dimension.
scss
@function find-break($break) {
    $breakpoint: if(map-get($breakpoints, $break), map-get($breakpoints, $break), $break);
    @return $breakpoint;
}Min width 
scss
@mixin mb-up($break) {
    $min: find-break($break);
    @media (min-width: $min) {
        @content;
    }
}Max width 
scss
@mixin mb-down($break) {
    $max: find-break($break) - $break-offset;
    @media (max-width: $max) {
        @content;
    }
}Between breakpoints 
scss
@mixin mb-between($lower-break, $upper-break) {
    $min: find-break($lower-break);
    $max: find-break($upper-break) - $break-offset;
    @media (min-width: $min) and (max-width: $max) {
        @content;
    }
}SCSS 
Variables 
scss
$breakpoints: (
    'sm': 576px,
    'md': 768px,
    'lg': 992px,
    'xl': 1200px,
) !default;
$break-offset: 0.02px !default;