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// This mixin outputs a property with rem units and a px fallback. | |
// Values passed without units are used as multipliers for the final | |
// rem and px values, all other units are output without modification. | |
// $unit-default-px represents the root value of the document font-size | |
// in pixels. | |
// | |
// i.e. html { font-size: 100%;} // -> 16px | |
// Usage: | |
// @include px-and-rem([property], [multiplier | explicit value] [, ...]); | |
// Example 1: | |
// | |
// $unit-default-px: 16px; | |
// | |
// .margin { @include px-and-rem(margin, 2);} | |
// | |
// becomes | |
// | |
// .margin { | |
// margin: 32px; | |
// margin: 2rem; | |
// } | |
// Example 2: | |
// | |
// $unit-default-px: 16px; | |
// | |
// .padding { @include px-and-rem(padding, 1, 2%, 1.5em);} | |
// | |
// becomes | |
// | |
// .padding { | |
// padding: 16px 2% 1.5em; | |
// padding: 1rem 2% 1.5em; | |
// } | |
@function fix8_unit_to_px($val) { | |
@if $val == auto { | |
@return $val; | |
} | |
@else { | |
@if unitless($val) { | |
@if $val == 0 { @return $val } | |
@else { @return $val * $unit-default-px}; | |
} @else { @return $val}; | |
} | |
} | |
@function fix8_unit_to_rem($val) { | |
@if $val == auto { | |
@return $val; | |
} | |
@else { | |
@if unitless($val) { | |
@if $val == 0 { @return $val } | |
@else { @return $val+rem}; | |
} @else { @return $val}; | |
} | |
} | |
@mixin px-and-rem($prop, $val...) { | |
$n: length($val); | |
$i: 1; | |
$px-list: (); | |
$rem-list: (); | |
@while $i <= $n { | |
$px-list: append($px-list, fix8_unit_to_px(nth($val, $i))); | |
$rem-list: append($rem-list, fix8_unit_to_rem(nth($val, $i))); | |
$i: $i + 1; | |
} | |
#{$prop}: $px-list; | |
#{$prop}: $rem-list; | |
} |
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