Created
October 22, 2014 15:12
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// ---- | |
// Sass (v3.4.6) | |
// Compass (v1.0.1) | |
// ---- | |
// THE SELF-AWARE MIXIN | |
// | |
// Should you use a mixin or an extend? | |
// This mixin makes that question moot. | |
// It checks to see if your mixin config exists | |
// if it does it extends a placeholder ID | |
// with that config. | |
// | |
// Modified from Lu Nelson's example | |
// http://lunelson.roughdraft.io/cc1b431a69360949dc01-the-self-aware-sass-mixin | |
// global map stores every mixin configuration | |
$mixin-configurations: (); | |
// define mixin with any format of arguments | |
@mixin self-aware($my-args) { | |
// look up these arguments as a key in the global map | |
$id: map-get($mixin-configurations, $my-args); | |
// if they return an 'ID'... | |
@if $id { | |
// extend that ID | |
@extend %#{$id}; | |
} @else { | |
// create the ID | |
$id: unique-id(); | |
// merge the ID in to the mixin's map against the ARGS | |
$mixin-configurations: map-merge($mixin-configurations, ($my-args: $id)) !global; | |
//create a new placeholder | |
@include create-placeholder($id, $my-args); | |
// extend that placeholder | |
@extend %#{$id}; | |
} | |
} | |
@mixin create-placeholder($id, $args){ | |
// create a placeholder named after the ID at root | |
@at-root { | |
%#{$id} { | |
@each $argument, $value in $args { | |
#{$argument}: $value; | |
} | |
} | |
} | |
} | |
@mixin border-radius($radius: 0.5em) { | |
// pass self aware mixin an array of arguments | |
$args: ( | |
-webkit-border-radius: $radius, | |
-moz-border-radius: $radius, | |
border-radius: $radius | |
); | |
@include self-aware($args); | |
} | |
.shared1 { | |
@include border-radius(2px); | |
} | |
.shared2 { | |
@include border-radius(2px); | |
} | |
.unique { | |
@include border-radius(5px); | |
} |
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.shared1, .shared2 { | |
-webkit-border-radius: 2px; | |
-moz-border-radius: 2px; | |
border-radius: 2px; | |
} | |
.unique { | |
-webkit-border-radius: 5px; | |
-moz-border-radius: 5px; | |
border-radius: 5px; | |
} |
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