@techmely/utils/alphaHex.js

Collection of helpful JavaScript / TypeScript utils

'use strict';

/*!
 * @techmely/utils
 * Copyright(c) 2021-2024 Techmely <techmely.creation@gmail.com>
 * MIT Licensed
 */


// src/percentToHex.ts
function percentToHex(percent) {
  if (percent < 0 || percent > 100) {
    throw new Error("Value must in range [0, 100]");
  }
  const intValue = Math.round(percent / 100 * 255);
  const hexValue = intValue.toString(16);
  return hexValue.padStart(2, "0").toUpperCase();
}

// src/alphaHex.ts
var HEX_LENGTH = 6;
var HEX_OPACITY_LENGTH = 8;
function alphaHex(hex, alpha) {
  if (!hex) {
    throw new Error("Hex value is required");
  }
  if (hex.length === HEX_OPACITY_LENGTH) {
    return `${hex.slice(0, HEX_LENGTH)}${percentToHex(alpha)}`;
  }
  return `${hex}${percentToHex(alpha)}`;
}

exports.alphaHex = alphaHex;