bytes storage units fomatter

units.tsx

export enum Units {
  B = 1,
  KB = 1 * 1024,
  MB = 1 * 1024 * 1024,
  GB = 1 * 1024 * 1024 * 1024,
  TB = 1 * 1024 * 1024 * 1024 * 1024,
}

const UnitsName = ['B', 'KB', 'MB', 'GB', 'TB'];

export function toUnitString(value: number, unitIdx = 0): string {
  const unitName = UnitsName[unitIdx];

  if (unitIdx === (UnitsName.length - 1)) return `${value.toFixed(2)}${unitName}`;

  // `1023MB` should to be `0.99GB`
  if (value > 896) return toUnitString(value / 1024, unitIdx + 1);

  return `${value.toFixed(2)}${unitName}`;
}