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Testing em and rem mixins and functions on http://sassmeister.com/gist/7271193
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| <h1>Title</h1> | |
| <div class="caption"> | |
| caption | |
| </div> | |
| <div class="big"> | |
| I'm a big font. | |
| <p> | |
| Paragraph paragraph paragraph paragraph paragraph paragraph paragraph. | |
| </p> | |
| </div> |
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| // ---- | |
| // Sass (v3.3.0.rc.1) | |
| // Compass (v0.13.alpha.10) | |
| // ---- | |
| @import "compass"; | |
| //============================================== | |
| // VARS | |
| $rembase: 16; | |
| $fontpx: 16; // Font size (px) baseline applied to <body> and converted to %. | |
| //============================================== | |
| // MIXINS | |
| @function strip-unit($num) { | |
| @return $num / ($num * 0 + 1); | |
| } | |
| @mixin rel($property, $value, $context: $base-font-size) { | |
| $length: length($value); | |
| @if type-of($value) == "number" { | |
| @if ($property == "line-height") { | |
| $value: strip-unit($value); | |
| #{$property}: ($value/$context); | |
| } @else { | |
| $value: strip-unit($value); | |
| #{$property}: ($value/$context + 0em); | |
| } | |
| } @else { | |
| // Create list to append values to. | |
| $allvalues: (); | |
| @each $singleValue in $value { | |
| @if $singleValue == 0 or type-of($singleValue) != "number" { | |
| // Append 0 as is or strings such as 'auto'. | |
| $allvalues: append($allvalues, $singleValue); | |
| } @else { | |
| $allvalues: append($allvalues, #{strip-unit($singleValue) / $context}em); | |
| } | |
| } | |
| #{$property}: $allvalues; | |
| } | |
| } | |
| // Only rel can be a function, rem returns two values. | |
| @mixin rem($property, $sizeValue: $rembase) { | |
| $length: length($sizeValue); | |
| @if type-of($sizeValue) == "number" { | |
| // If we want line-height to be unitless everywhere, do not use the rem function. | |
| #{$property}: strip-unit($sizeValue) + px; | |
| #{$property}: (strip-unit($sizeValue)/$rembase) + rem; | |
| } @else { | |
| // Create list to append values to. | |
| $allvalues: (); | |
| $allvaluespx: (); | |
| @each $singleValue in $sizeValue { | |
| @if $singleValue == 0 or type-of($singleValue) != "number" { | |
| // Append 0 as is or strings such as 'auto'. | |
| $allvaluespx: append($allvaluespx, $singleValue); | |
| $allvalues: append($allvalues, $singleValue); | |
| } @else { | |
| $allvaluespx: append($allvaluespx, $singleValue + 0px); | |
| $allvalues: append($allvalues, ( strip-unit($singleValue) / $rembase) + 0rem); | |
| } | |
| } | |
| #{$property}: $allvaluespx; | |
| #{$property}: $allvalues; | |
| } | |
| } | |
| // Difference between functions and mixins: http://thesassway.com/advanced/pure-sass-functions | |
| @function relfunc($value, $context: $fontpx) { | |
| $length: length($value); | |
| @if type-of($value) == "number" { | |
| $value: strip-unit($value); | |
| @return #{$value/$context}em; | |
| } @else { | |
| // Create list to append values to. | |
| $allvalues: (); | |
| @each $singleValue in $value { | |
| @if $singleValue == 0 or type-of($singleValue) != "number" { | |
| // Append 0 as is or strings such as 'auto'. | |
| $allvalues: append($allvalues, $singleValue); | |
| } @else { | |
| $allvalues: append($allvalues, #{strip-unit($singleValue) / $context}em); | |
| } | |
| } | |
| @return $allvalues; | |
| } | |
| } | |
| //============================================== | |
| // CSS | |
| .big { | |
| @include rel(font-size, 25) | |
| } | |
| .big p { | |
| @include rel(font-size, 16, 25); | |
| } | |
| h1 { | |
| @include rel(font-size, 26px); | |
| @include rem(margin-bottom, 10px); | |
| } | |
| .caption { | |
| @include rel(margin, 40 auto 40); | |
| padding: relfunc(100); | |
| } |
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| .big { | |
| font-size: 1.5625em; | |
| } | |
| .big p { | |
| font-size: 0.64em; | |
| } | |
| h1 { | |
| font-size: 1.625em; | |
| margin-bottom: 10px; | |
| margin-bottom: 0.625rem; | |
| } | |
| .caption { | |
| margin: 2.5em auto 2.5em; | |
| padding: 6.25em; | |
| } |
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| <h1>Title</h1> | |
| <div class="caption"> | |
| caption | |
| </div> | |
| <div class="big"> | |
| I'm a big font. | |
| <p> | |
| Paragraph paragraph paragraph paragraph paragraph paragraph paragraph. | |
| </p> | |
| </div> |
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