hd-utils/lib/utils/string/hexToRgbA.js

A handy utils for modern JS developers

import isHexColor from '../validation/isHexColor';
/**
 * @description converts hex colors to rgba color.
 * @example hexToRgbA("#fff") // rgba(255,255,255,1)
 */
export default function hexToRgbA(hex, alpha = 1) {
    if (!isHexColor(hex))
        throw new Error('Bad Hex');
    let c;
    c = hex.substring(1).split('');
    if (c.length == 3) {
        c = [c[0], c[0], c[1], c[1], c[2], c[2]];
    }
    c = '0x' + c.join('');
    return ('rgba(' +
        [(c >> 16) & 255, (c >> 8) & 255, c & 255].join(',') +
        `,${alpha})`);
}