Utility functions for base64 encoding/decoding for buffers in Node.js

base64.js

/**
 * Take a file and convert to a base64 encoded string.
 *
 * @param buffer A Buffer instance.
 * @returns {string} A base64 encoded string.
 */
function base64Encode(buffer) {
    return new Buffer.from(buffer).toString('base64');
}

/**
 * Take a base64 encoded string and convert to a buffer.
 *
 * @param base64
 * @returns {Buffer}
 */
function base64Decode(base64) {
    return new Buffer.from(base64, 'base64');
}