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36 lines
706 B
36 lines
706 B
var nodes = require('../nodes') |
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, rgba = require('./rgba'); |
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/** |
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* Return the alpha component of the given `color`, |
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* or set the alpha component to the optional second `value` argument. |
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* |
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* Examples: |
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* |
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* alpha(#fff) |
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* // => 1 |
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* |
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* alpha(rgba(0,0,0,0.3)) |
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* // => 0.3 |
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* |
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* alpha(#fff, 0.5) |
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* // => rgba(255,255,255,0.5) |
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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 alpha(color, value){ |
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color = color.rgba; |
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if (value) { |
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return rgba( |
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new nodes.Unit(color.r), |
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new nodes.Unit(color.g), |
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new nodes.Unit(color.b), |
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value |
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); |
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} |
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return new nodes.Unit(color.a, ''); |
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};
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