Support for bigint

[antho1404]

When sending data with mixpanel.track(event, data), if data contains unserializable data such as bigint, the call fails.

It would be great to support bigint in mixpanel and automatically serialize them as string.

The current workaround is to call the following to manually convert these bigint into string so there are no errors in the mixpanel library.

mixpanel.track(event, JSON.parse(
  JSON.stringify(data, (key, value) => {
    if (typeof value === "bigint") return value.toString();
    return value;
  })
))

[hans-lizihan]

you can patch toJSON method on BigInt class if you are sure that you want to send them as string.

BigInt.prototype["toJSON"] = function () {
  return this.toString();
};

[antho1404]

This is far from ideal as it is changing the default behavior of big int and can have many side effects.
The vest case scenario would be to to the test during the stringify here https://github.com/mixpanel/mixpanel-node/blob/261a98b929e7c2ce6c99d8169335fb06b86ff8d9/lib/mixpanel-node.js#L71C35-L71C49