JavaScript bigint are printed as `{}`

[matbour]

Consider this script:

// demo-logger.ts 
import { Logger } from 'tslog';

const logger = new Logger();
const obj = { name: 'John Doe', balance: 100n };

logger.info(obj);

With the default settings, it will output:

node ./demo-logger.ts 
2026-01-22 15:32:55.411 INFO   demo-logger.ts:6        {
  name: 'John Doe',
  balance: 
   {
   
   } 
}

Which of course cause the 100n value to be lost.

I am wondering what's the best approach:

• Is the empty object the intended behavior?
• If not, what should be the intended format? 100n, '100n'. something else?
• Is there any for me to define a custom formatter for bigint?