Format size in human-readable way

human-readable-size.ts

/**
 * Format size in bytes in a human-readable way
 * Examples:
 *   - humanReadableBytes(9708) → "9.48 KB"
 *   - humanReadableBytes(9708098213) → "9.04 GB"
 * @param bytes Amount in bytes
 * @return Formatted price
 */
function humanReadableSize(bytes: number): string {
  const names: string[] = ['B', 'KB', 'MB', 'GB', 'TB', 'PB'];

  let rest = bytes;

  for (const size in names) {
    if (rest > 1024) {
      rest = Number((rest / 1024).toPrecision(3));
    } else {
      return `${rest} ${names[size]}`;
    }
  }

  return `${rest} ${names[names.length - 1]}`;
}