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

In my custom Axios instance, I would like to provide my own reviver function to JSON.parse to deserialize dates. I could use a transformResponse but I do not want to bypass the default behaviour the existing implementation.

Describe the solution you'd like

Instead, I'm hoping to optionally provide my own reviver that is exposed as a default:

// Axios internal default object
const defaults = {
  transitional: transitionalDefaults,
  adapter: ['xhr', 'http'],
  parseReviver: null,
  transformResponse: [function transformResponse(data) {
    ...
    try {
        return JSON.parse(data, this.parseReviver);
    } catch (e) {
        ...
    }
  },
  ...
}

// My instance
const instance = axios.create({
  parseReviver: (key, value) => /* custom implementation */
});

Describe alternatives you've considered

Override the transformResponse but I'm ignoring many essential default implementations and validations.

Also tried providing my own response interceptor, but it's too late by then and have to recursively walk the object tree to conditionally convert each property which is heavy and error prone:

const convertDateProperties = <T>(data: T) => {
  if (typeof data === 'string' && /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\.\d{3})?Z$/.test(data)) {
    return new Date(data) as unknown as T;
  }

  if (Array.isArray(data)) {
    return data.map((item) => convertDateProperties(item)) as unknown as T;
  }

  if (data instanceof Object) {
    return Object.keys(data).reduce((acc, key) => {
      acc[key] = convertDateProperties(data[key]);
      return acc;
    }, {} as T);
  }

  return data;
};

instance.interceptors.response.use(
  (response) => {
    if (response.data) {
      response.data = convertDateProperties(response.data);
    }
    return response;
  },
  (error) => Promise.reject(error)
);

Additional context/Screenshots

• Discussion Reviver #968
• JSON.parse docs
• JSON reviver use case