The function Number.isFinite returns false for all arguments of type bigint. So the formatting function throws immediately. It would be helpful if bigint would be supported as well. I would like to use it with Node's fs.stat, which now can return bigint values for file sizes.

(I tested how the function would behave without the check, and unfortunately the Math functions do not support bigint arguments: Cannot convert a BigInt value to a number at Math.log)