rgba.js

const rgba = (value, opacity) => {

  const isHex = ((hex) => {
    return /(^#[0-9A-F]{6}$)|(^#[0-9A-F]{3}$)/i.test(hex)
  });

  const hexToRGB = ((hex) => {
    const shorthandRegex = /^#?([a-f\d])([a-f\d])([a-f\d])$/i;

    const longHex = hex.replace(shorthandRegex, function (m, r, g, b) {
      return r + r + g + g + b + b;
    });

    let result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(longHex);

    return result ? `${parseInt(result[1], 16)}, ${parseInt(result[2], 16)}, ${parseInt(result[3], 16)}` : null;
  });

  if (isHex(value)) {
    const rgb = hexToRGB(value);

    return `rgba(${rgb}, ${opacity})`
  }

  console.log('stop sending me not hex values')
  return null;
}

export default rgba;