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35 lines
744 B
35 lines
744 B
9 years ago
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var nodes = require('../nodes')
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, hsla = require('./hsla')
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, component = require('./component');
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/**
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* Return the lightness component of the given `color`,
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* or set the lightness component to the optional second `value` argument.
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*
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* Examples:
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*
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* lightness(#00c)
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* // => 100%
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*
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* lightness(#00c, 80%)
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* // => #99f
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*
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* @param {RGBA|HSLA} color
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* @param {Unit} [value]
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* @return {Unit|RGBA}
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* @api public
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*/
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module.exports = function lightness(color, value){
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if (value) {
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var hslaColor = color.hsla;
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return hsla(
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new nodes.Unit(hslaColor.h),
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new nodes.Unit(hslaColor.s),
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value,
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new nodes.Unit(hslaColor.a)
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)
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}
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return component(color, new nodes.String('lightness'));
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};
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