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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, xxl: 1400px) | ||
// | ||
// The map defined in the `$grid-breakpoints` global variable is used as the `$breakpoints` argument by default. | ||
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// 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, xxl: 1400px)) | ||
// md | ||
// >> breakpoint-next(sm, $breakpoint-names: (xs sm md lg xl xxl)) | ||
// md | ||
@function breakpoint-next($name, $breakpoints: $grid-breakpoints, $breakpoint-names: map-keys($breakpoints)) { | ||
$n: index($breakpoint-names, $name); | ||
@if not $n { | ||
@error "breakpoint `#{$name}` not found in `#{$breakpoints}`"; | ||
} | ||
@return if($n < length($breakpoint-names), nth($breakpoint-names, $n + 1), null); | ||
} | ||
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// Minimum breakpoint width. Null for the smallest (first) breakpoint. | ||
// | ||
// >> breakpoint-min(sm, (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px, xxl: 1400px)) | ||
// 576px | ||
@function breakpoint-min($name, $breakpoints: $grid-breakpoints) { | ||
$min: map-get($breakpoints, $name); | ||
@return if($min != 0, $min, null); | ||
} | ||
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// Maximum breakpoint width. | ||
// The maximum value is reduced by 0.02px to work around the limitations of | ||
// `min-` and `max-` prefixes and viewports with fractional widths. | ||
// See https://www.w3.org/TR/mediaqueries-4/#mq-min-max | ||
// Uses 0.02px rather than 0.01px to work around a current rounding bug in Safari. | ||
// See https://bugs.webkit.org/show_bug.cgi?id=178261 | ||
// | ||
// >> breakpoint-max(md, (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px, xxl: 1400px)) | ||
// 767.98px | ||
@function breakpoint-max($name, $breakpoints: $grid-breakpoints) { | ||
$max: map-get($breakpoints, $name); | ||
@return if($max and $max > 0, $max - .02, null); | ||
} | ||
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// Returns a blank string if smallest breakpoint, otherwise returns the name with a dash in front. | ||
// Useful for making responsive utilities. | ||
// | ||
// >> breakpoint-infix(xs, (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px, xxl: 1400px)) | ||
// "" (Returns a blank string) | ||
// >> breakpoint-infix(sm, (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px, xxl: 1400px)) | ||
// "-sm" | ||
@function breakpoint-infix($name, $breakpoints: $grid-breakpoints) { | ||
@return if(breakpoint-min($name, $breakpoints) == null, "", "-#{$name}"); | ||
} | ||
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// 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: $min) { | ||
@content; | ||
} | ||
} @else { | ||
@content; | ||
} | ||
} | ||
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// Media of at most the maximum breakpoint width. No query for the largest breakpoint. | ||
// Makes the @content apply to the given breakpoint and narrower. | ||
@mixin media-breakpoint-down($name, $breakpoints: $grid-breakpoints) { | ||
$max: breakpoint-max($name, $breakpoints); | ||
@if $max { | ||
@media (max-width: $max) { | ||
@content; | ||
} | ||
} @else { | ||
@content; | ||
} | ||
} | ||
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// Media that spans multiple breakpoint widths. | ||
// Makes the @content apply between the min and max breakpoints | ||
@mixin media-breakpoint-between($lower, $upper, $breakpoints: $grid-breakpoints) { | ||
$min: breakpoint-min($lower, $breakpoints); | ||
$max: breakpoint-max($upper, $breakpoints); | ||
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@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, $breakpoints) { | ||
@content; | ||
} | ||
} | ||
} | ||
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// Media between the breakpoint's minimum and maximum widths. | ||
// No minimum for the smallest breakpoint, and no maximum for the largest one. | ||
// Makes the @content apply only to the given breakpoint, not viewports any wider or narrower. | ||
@mixin media-breakpoint-only($name, $breakpoints: $grid-breakpoints) { | ||
$min: breakpoint-min($name, $breakpoints); | ||
$next: breakpoint-next($name, $breakpoints); | ||
$max: breakpoint-max($next, $breakpoints); | ||
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@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 $min == null { | ||
@include media-breakpoint-down($next, $breakpoints) { | ||
@content; | ||
} | ||
} | ||
} | ||
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