source: frontend/node_modules/webpack/lib/util/removeBOM.js

/*
        MIT License http://www.opensource.org/licenses/mit-license.php
        Author Alexander Akait @alexander-akait
*/

"use strict";

/**
 * Returns result without BOM.
 * @param {string | Buffer} strOrBuffer string or buffer
 * @returns {string | Buffer} result without BOM
 */
module.exports = (strOrBuffer) => {
        if (typeof strOrBuffer === "string" && strOrBuffer.charCodeAt(0) === 0xfeff) {
                return strOrBuffer.slice(1);
        } else if (
                Buffer.isBuffer(strOrBuffer) &&
                strOrBuffer[0] === 0xef &&
                strOrBuffer[1] === 0xbb &&
                strOrBuffer[2] === 0xbf
        ) {
                return strOrBuffer.subarray(3);
        }

        return strOrBuffer;
};