@amxdev/format-bytes/src/index.ts

Format bytes as human-readable string (e.g. 2.5 MB).

export function uuid(): string {
  const hex = [...crypto.getRandomValues(new Uint8Array(16))].map(b =>
    b.toString(16).padStart(2, '0')
  );

  // Per RFC4122: version 4 UUID format
  hex[6] = (parseInt(hex[6], 16) & 0x0f | 0x40).toString(16); // version 4
  hex[8] = (parseInt(hex[8], 16) & 0x3f | 0x80).toString(16); // variant

  return [
    hex.slice(0, 4).join(''),
    hex.slice(4, 6).join(''),
    hex.slice(6, 8).join(''),
    hex.slice(8, 10).join(''),
    hex.slice(10, 16).join('')
  ].join('-');
}