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- // Breakpoint viewport sizes and media queries.
- //
- // Breakpoints are defined as a map of (name: minimum width), order from small to large:
- //
- // (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px)
- //
- // The map defined in the `$grid-breakpoints` global variable is used as the `$breakpoints` argument by default.
-
- // Name of the next breakpoint, or null for the last breakpoint.
- //
- // >> breakpoint-next(sm)
- // md
- // >> breakpoint-next(sm, (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px))
- // md
- // >> breakpoint-next(sm, $breakpoint-names: (xs sm md lg xl))
- // md
- @function breakpoint-next($name, $breakpoints: $grid-breakpoints, $breakpoint-names: map-keys($breakpoints)) {
- $n: index($breakpoint-names, $name);
- @return if($n < length($breakpoint-names), nth($breakpoint-names, $n + 1), null);
- }
-
- // Minimum breakpoint width. Null for the smallest (first) breakpoint.
- //
- // >> breakpoint-min(sm, (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px))
- // 576px
- @function breakpoint-min($name, $breakpoints: $grid-breakpoints) {
- $min: map-get($breakpoints, $name);
- @return if($min != 0, $min, null);
- }
-
- // Maximum breakpoint width. Null for the largest (last) breakpoint.
- // The maximum value is calculated as the minimum of the next one less 0.02px
- // to work around the limitations of `min-` and `max-` prefixes and viewports with fractional widths.
- // See https://www.w3.org/TR/mediaqueries-4/#mq-min-max
- // Uses 0.02px rather than 0.01px to work around a current rounding bug in Safari.
- // See https://bugs.webkit.org/show_bug.cgi?id=178261
- //
- // >> breakpoint-max(sm, (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px))
- // 767.98px
- @function breakpoint-max($name, $breakpoints: $grid-breakpoints) {
- $next: breakpoint-next($name, $breakpoints);
- @return if($next, breakpoint-min($next, $breakpoints) - .02px, null);
- }
-
- // Returns a blank string if smallest breakpoint, otherwise returns the name with a dash in front.
- // Useful for making responsive utilities.
- //
- // >> breakpoint-infix(xs, (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px))
- // "" (Returns a blank string)
- // >> breakpoint-infix(sm, (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px))
- // "-sm"
- @function breakpoint-infix($name, $breakpoints: $grid-breakpoints) {
- @return if(breakpoint-min($name, $breakpoints) == null, "", "-#{$name}");
- }
-
- // Media of at least the minimum breakpoint width. No query for the smallest breakpoint.
- // Makes the @content apply to the given breakpoint and wider.
- @mixin media-breakpoint-up($name, $breakpoints: $grid-breakpoints) {
- $min: breakpoint-min($name, $breakpoints);
- @if $min {
- @media (min-width: $min) {
- @content;
- }
- } @else {
- @content;
- }
- }
-
- // Media of at most the maximum breakpoint width. No query for the largest breakpoint.
- // Makes the @content apply to the given breakpoint and narrower.
- @mixin media-breakpoint-down($name, $breakpoints: $grid-breakpoints) {
- $max: breakpoint-max($name, $breakpoints);
- @if $max {
- @media (max-width: $max) {
- @content;
- }
- } @else {
- @content;
- }
- }
-
- // Media that spans multiple breakpoint widths.
- // Makes the @content apply between the min and max breakpoints
- @mixin media-breakpoint-between($lower, $upper, $breakpoints: $grid-breakpoints) {
- $min: breakpoint-min($lower, $breakpoints);
- $max: breakpoint-max($upper, $breakpoints);
-
- @if $min != null and $max != null {
- @media (min-width: $min) and (max-width: $max) {
- @content;
- }
- } @else if $max == null {
- @include media-breakpoint-up($lower, $breakpoints) {
- @content;
- }
- } @else if $min == null {
- @include media-breakpoint-down($upper, $breakpoints) {
- @content;
- }
- }
- }
-
- // Media between the breakpoint's minimum and maximum widths.
- // No minimum for the smallest breakpoint, and no maximum for the largest one.
- // Makes the @content apply only to the given breakpoint, not viewports any wider or narrower.
- @mixin media-breakpoint-only($name, $breakpoints: $grid-breakpoints) {
- $min: breakpoint-min($name, $breakpoints);
- $max: breakpoint-max($name, $breakpoints);
-
- @if $min != null and $max != null {
- @media (min-width: $min) and (max-width: $max) {
- @content;
- }
- } @else if $max == null {
- @include media-breakpoint-up($name, $breakpoints) {
- @content;
- }
- } @else if $min == null {
- @include media-breakpoint-down($name, $breakpoints) {
- @content;
- }
- }
- }
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