ce4c83ff
 wxy
初始提交
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var nodes = require('../nodes')
, hsla = require('./hsla')
, component = require('./component');
/**
* Return the lightness component of the given `color`,
* or set the lightness component to the optional second `value` argument.
*
* Examples:
*
* lightness(#00c)
* // => 100%
*
* lightness(#00c, 80%)
* // => #99f
*
* @param {RGBA|HSLA} color
* @param {Unit} [value]
* @return {Unit|RGBA}
* @api public
*/
module.exports = function lightness(color, value){
if (value) {
var hslaColor = color.hsla;
return hsla(
new nodes.Unit(hslaColor.h),
new nodes.Unit(hslaColor.s),
value,
new nodes.Unit(hslaColor.a)
)
}
return component(color, new nodes.String('lightness'));
};
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