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CoffeeScript CSS | ||
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main.coffee: | ||
ccss = require 'ccss' | ||
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rules = | ||
'.foo': do -> | ||
template = require './template.coffee' | ||
css = ccss.compile template | ||
require('fs').writeFileSync 'main.css', css | ||
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#or all at once: ccss.compileFile './template.coffee', 'main.css' | ||
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template.coffee: | ||
borderRadius = (str) -> | ||
WebkitBorderRadius: str | ||
MozBorderRadius: str | ||
borderRadius: str | ||
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boxShadow = (str) -> | ||
WebkitBoxShadow: str | ||
MozBoxShadow: str | ||
boxShadow: str | ||
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module.exports = | ||
form: | ||
input: | ||
padding: '5px' | ||
border: '1px solid' | ||
mixin: borderRadius '5px' | ||
'#id .className': do -> | ||
opaque = 1 | ||
translucent = opaque / 2 | ||
img: | ||
mixin: [ | ||
borderRadius '5px' | ||
boxShadow '5px' | ||
] | ||
opacity: translucent | ||
'img:hover': | ||
opacity: opaque | ||
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css = ccss.compile rules | ||
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console.log css | ||
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### output: | ||
.foo img { | ||
main.css: | ||
form input { | ||
padding: 5px; | ||
border: 1px solid; | ||
-webkit-border-radius: 5px; | ||
-moz-border-radius: 5px; | ||
border-radius: 5px; | ||
} | ||
#id .className img { | ||
opacity: 0.5; | ||
-webkit-border-radius: 5px; | ||
-moz-border-radius: 5px; | ||
border-radius: 5px; | ||
-webkit-box-shadow: 5px; | ||
-moz-box-shadow: 5px; | ||
box-shadow: 5px; | ||
} | ||
.foo img:hover { | ||
#id .className img:hover { | ||
opacity: 1; | ||
} | ||
### | ||
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the core of the compiler is simply this: | ||
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iterate over the key / values of an object; if the value is another object, | ||
append the key to the current selector, and recurse; else generate css. | ||
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if you want logic, wrap it up in a function which returns an object. | ||
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keys that would confuse the real compiler, coffee-script, must be quoted. | ||
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to reduce the amount of quoting, if a css property has a capital letter C, | ||
it will be transformed into -c; selectors are not touched. | ||
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eg, instead of | ||
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borderRadius = (arg) -> | ||
'-webkit-border-radius': arg | ||
'-moz-border-radius': arg | ||
'border-radius': arg | ||
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we can write | ||
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borderRadius = (arg) -> | ||
WebkitBorderRadius: arg | ||
MozBorderRadius: arg | ||
borderRadius: arg | ||
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'#id .className': | ||
borderRadius 5 | ||
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compiled: | ||
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#id .className { | ||
-webkit-border-radius: 5; | ||
-moz-border-radius: 5; | ||
border-radius: 5; | ||
} |