@mixin hover { @if $use-hover-media-query { // See Media Queries Level 4: http://drafts.csswg.org/mediaqueries/#hover // Currently shimmed by https://github.com/twbs/mq4-hover-shim @media (hover: hover) { &:hover { @content } } } @else { &:hover { @content } } } @mixin hover-focus { @if $use-hover-media-query { &:focus { @content } @include hover { @content } } @else { &:focus, &:hover { @content } } } @mixin plain-hover-focus { @if $use-hover-media-query { &, &:focus { @content } @include hover { @content } } @else { &, &:focus, &:hover { @content } } } @mixin hover-focus-active { @if $use-hover-media-query { &:focus, &:active { @content } @include hover { @content } } @else { &:focus, &:active, &:hover { @content } } }