Issue with Axios and BigInt Serialization

[kartik-gupta-ij]

Hello Axios Community,

I hope this message finds you well. I am currently facing an issue related to the serialization of BigInt in Axios, and I'm seeking guidance on how to resolve it.

I've identified that the error is occurring in the following code snippet from Axios:

function stringifySafely(rawValue, parser, encoder) {
  // ... (function details)
}

// Source: https://github.com/axios/axios/blob/d844227411263fab39d447442879112f8b0c8de5/lib/defaults/index.js#L21C10-L21C25

The error message I'm encountering is:

TypeError: Do not know how to serialize a BigInt at stringify

As part of my debugging process, I've created custom parser and encoder functions specifically designed for handling BigInts when parsing JSON data. However, I'm struggling to understand how to pass these custom functions to Axios so that they are utilized by the stringifySafely function.

Here is a simplified version of my custom functions:

let bigintReviver
let bigintReplacer
if ('rawJSON' in JSON) {
  bigintReviver = function (_key, val, context) {
    if (Number.isInteger(val) && !Number.isSafeInteger(val)) {
      return BigInt(context?.source) 
    }
    return val
  }
  bigintReplacer = function (_key, val) {
    if (typeof val === 'bigint') {
      return JSON.rawJSON?.(String(val))
    }
    return val
  }
}

export const jsonBigIntParse = function (jsonString, reviver, parserConfig) {
  if (bigintReviver) {
    return JSON.parse(jsonString, bigintReviver, parserConfig)
  }
  return JSON.parse(jsonString, reviver)
}

export const jsonBigIntParseStringify = function (value, replacer, space) {
  if (bigintReplacer) {
    return JSON.stringify(value, bigintReplacer, space)
  }
  return JSON.stringify(value, replacer, space)
}

My question is: How can I properly configure Axios to utilize these custom parser and encoder functions within the stringifySafely function? I believe this is the key to resolving the BigInt serialization issue I am facing.

Any guidance or suggestions on the best approach to integrate custom parser and encoder functions with Axios would be highly appreciated.

Thank you in advance for your assistance.