let [b64PlayerSaveString, setB64PlayerSaveString] = useState<string>('');

      {btoa(JSON.stringify(playerSave))}

      <div>
      <button onClick={() => {
        // window.alert(btoa(JSON.stringify(playerSave)));
        setB64PlayerSaveString(btoa(JSON.stringify(playerSave, undefined, 2)));
      }}>
        export to base64 {' '}
      </button></div>
      <div>{b64PlayerSaveString}</div>