Since this is stage 3 this means browsers are beggining to implement it. If you want to try it Chrome has had it since version 67 [1]. [1]: https://developers.

Since this is stage 3 this means browsers are beggining to implement it. If you want to try it Chrome has had it since version 67 [1]. [1]: https://developers.google.com/web/updates/2018/05/bigint https://developers.google.com/web/updates/2018/05/bigint