pixel-utils/dist/esm/add-alpha/index.js

Utility Functions for Pixels

/**
 * @description adds an alpha channel to an RGB Pixel, creating a new RGBA pixel
 * @param rgb - a 3-number RGB pixel
 * @returns rgba - a 4-number array representing an RGBA pixel
 */
export default function addAlpha(rgb) {
  return [...rgb, 255];
}