function formatBytes(bytes, decimals = 2) {
  if (!+bytes) {
    return '0 Bytes';
  }
  const k = 1024;
  const dm = decimals < 0 ? 0 : decimals;
  const sizes = [' bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
  const i = Math.floor(Math.log(bytes) / Math.log(k));
  return `${parseFloat((bytes / k ** i).toFixed(dm))}${sizes[i]}`;
}
@param {number} bytes
@param {number} decimals