Uncaught TypeError: Do not know how to serialize a BigInt

[taoqf]

Is your feature request related to a problem? Please describe.

JSON.stringify({key:1n});

throws:

Uncaught TypeError: Do not know how to serialize a BigInt
    at JSON.stringify (<anonymous>)

Describe the solution you'd like

"{\"key\":1n}"

Describe alternatives you've considered

when call JSON.parse the string, it should convert back to {key:1n}.

[devsnek]

This is working as intended, bigints are not supported by JSON. See https://github.com/tc39/proposal-json-parse-with-source for a WIP solution.