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Unit Converting Sass Function
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// ---- | |
// Sass (v3.4.12) | |
// Compass (v1.0.3) | |
// ---- | |
$baseSize: 16px; | |
$convertBase: $baseSize; | |
html { | |
font-size: percentage($baseSize / 16px); | |
} | |
@function convert($value, $convertUnit, $convertBase: $convertBase) { | |
$currentUnit: unit($value); | |
$strippedValue: $value / ($value * 0 + 1); | |
@if not unitless($convertBase) { | |
@if unit($convertBase) != px { | |
@error "Not supported unit '#{unit($convertBase)}' as convert base!"; | |
} | |
$convertBase: $convertBase / ($convertBase * 0 + 1); | |
} | |
@if $currentUnit == px { | |
@if $convertUnit == 'em' { | |
@return 0em + ($strippedValue / $convertBase); | |
} | |
@else if $convertUnit == '%' { | |
@return percentage($strippedValue / $convertBase); | |
} | |
} | |
@else if $currentUnit == em { | |
@if $convertUnit == 'px' { | |
@return 0px + ($strippedValue * $convertBase); | |
} | |
@else if $convertUnit == '%' { | |
@return percentage($strippedValue); | |
} | |
} | |
@else if $currentUnit == '%' { | |
@if $convertUnit == 'px' { | |
@return 0em + ($strippedValue * $convertBase / 100); | |
} | |
@else if $convertUnit == 'em' { | |
@return 0em + ($strippedValue / 100); | |
} | |
} | |
// TODO: Check for pt unit convert | |
@else if $currentUnit == pt { | |
@if $convertUnit == 'px' { | |
@return 0px + ($strippedValue * 1.3333); | |
} | |
@else if $convertUnit == 'em' { | |
@return 0em + ($strippedValue / 12); | |
} | |
@else if $convertUnit == '%' { | |
@return percentage($strippedValue / 12) | |
} | |
} | |
@error "Can't convert '#{$value}' to unit '#{$convertUnit}'!"; | |
} | |
.example1 { | |
font-size: convert(18px, '%'); /* converted from pixels */ | |
} | |
.example2 { | |
font-size: convert(13pt, 'em'); /* converted from points */ | |
} | |
.example3 { | |
font-size: convert(2.5em, 'px'); /* converted from ems */ | |
} | |
.example4 { | |
font-size: convert(234%, 'px'); /* converted from percentage */ | |
} |
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