@kcuf/mere-color/dist/esm/generate/fade-out.js

Mere color utils for generating, manipulation, a11y purposes.

import { manipulateRgb, rgbShiftAlpha } from '../util';

/**
 * Increase the transparency (or decrease the opacity) of a color, making it less opaque.
 *
 * 参考 https://lesscss.org/functions/#color-operations-fadeout
 */
export default function fadeOut(color) {
  var deltaAlpha = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 10;
  var min = arguments.length > 2 ? arguments[2] : undefined;
  return manipulateRgb(color, function (rgb) {
    return rgbShiftAlpha(rgb, deltaAlpha > 0 ? -deltaAlpha : 0, {
      min: min
    });
  });
}
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