Created
          January 8, 2015 02:40 
        
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  | // ---- | |
| // Sass (v3.4.9) | |
| // Compass (v1.0.1) | |
| // ---- | |
| // mixin will accept: | |
| // - min AND max pixel value, comma separated | |
| // - min OR max pixel value, comma separated, with 0 replacing the open-ended value | |
| // - single string value for predetermined breakpoints | |
| @mixin breakpoint($min: 0, $max: 0) { | |
| // check to see if first variable is string or number | |
| $type: type-of($min); | |
| // if it's a string, run predefined breakpoint declarations | |
| @if $type == string { | |
| @if $min == x-small { @media (max-width: 479px) { @content; } } | |
| @else if $min == small { @media (min-width: 480px) { @content; } } | |
| @else if $min == medium { @media (min-width: 768px) { @content; } } | |
| @else if $min == large { @media (min-width: 960px) { @content; } } | |
| @else if $min == x-large { @media (min-width: 1280px) { @content; } } | |
| @else { | |
| @warn "Check your variable name - must be one of x-small, small, medium, large, x-large"; | |
| } | |
| } | |
| // if it's a number, check if min, max or both are required. write new breakpoint using these boundaries. | |
| // default to 'all' if nothing specified. | |
| @else if $type == number { | |
| $query: "all" !default; | |
| @if $min != 0 and $max != 0 { $query: "(min-width: #{$min}) and (max-width: #{$max})"; } // set both min and max | |
| @else if $min != 0 and $max == 0 { $query: "(min-width: #{$min})"; } // set just min | |
| @else if $min == 0 and $max != 0 { $query: "(max-width: #{$max})"; } // set just max | |
| @media #{$query} { @content; } | |
| } | |
| } | |
| // example usage... | |
| div { | |
| @include breakpoint(320px, 480px) { | |
| color: magenta; | |
| } | |
| @include breakpoint(768px, 0) { | |
| color: lime; | |
| } | |
| @include breakpoint(0, 767px) { | |
| color: goldenrod; | |
| } | |
| @include breakpoint(large) { | |
| color: plum; | |
| } | |
| } | 
  
    
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  | @media (min-width: 320px) and (max-width: 480px) { | |
| div { | |
| color: magenta; | |
| } | |
| } | |
| @media (min-width: 768px) { | |
| div { | |
| color: lime; | |
| } | |
| } | |
| @media (max-width: 767px) { | |
| div { | |
| color: goldenrod; | |
| } | |
| } | |
| @media (min-width: 960px) { | |
| div { | |
| color: plum; | |
| } | |
| } | 
  
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@niaal Like this man! Reckon you may be able to roll some o' that
@if $type == stringlogic into a function that calls a map, so you can store your predefined breaks in a easy-to-edit format. Seems like it will work really well!