JSON.stringify can't handle BigInt by using this replacer it can

JSON_stringify_bigint.ts

// Stringify using the replacer
// const jsonBigInteger = JSON.stringify(bigInteger, bigIntReplacer);
// Parse from JSON
// const fromJsonBigInteger = JSON.parse(jsonBigInteger, bigIntReviver);

export function bigIntReplacer(key: string, value: any): any {
  if (typeof value === "bigint") {
    return value.toString() + "n";
  }
  return value;
}

export function bigIntReviver(key: string, value: any): any {
  if (typeof value === "string" && /^\d+n$/.test(value)) {
    return BigInt(value.slice(0, -1));
  }
  return value;
}

Be aware of a problem with this solution. If you have the string "107n" that's actually a string and not a BigInt then that will be revived as a BigInt. I propose only using the replacer.