// Grid Mixin @mixin breakpoint($class) { @if $class == xs { @media (max-width: 500px) { @content; } } @else if $class == sm { @media (max-width: 768px) { @content; } } @else if $class == md { @media (max-width: 992px) { @content; } } @else if $class == lg { @media (max-width: 1240px) { @content; } } @else { @warn "Breakpoint mixin supports: xs, sm, md, lg"; } }