How to catch and handle error response 422 with Redux/Axios?

Here is the proper way to handle the error object:

axios.put(this.apiBaseEndpoint + '/' + id, input)
.then((response) => {
    // Success
})
.catch((error) => {
    // Error
    if (error.response) {
        // The request was made and the server responded with a status code
        // that falls out of the range of 2xx
        // console.log(error.response.data);
        // console.log(error.response.status);
        // console.log(error.response.headers);
    } else if (error.request) {
        // The request was made but no response was received
        // `error.request` is an instance of XMLHttpRequest in the browser and an instance of
        // http.ClientRequest in node.js
        console.log(error.request);
    } else {
        // Something happened in setting up the request that triggered an Error
        console.log('Error', error.message);
    }
    console.log(error.config);
});

Origin url https://gist.github.com/fgilio/230ccd514e9381fafa51608fcf137253

Axios is probably parsing the response. I access the error like this in my code:

axios({
  method: 'post',
  responseType: 'json',
  url: `${SERVER_URL}/token`,
  data: {
    idToken,
    userEmail
  }
})
 .then(response => {
   dispatch(something(response));
 })
 .catch(error => {
   dispatch({ type: AUTH_FAILED });
   dispatch({ type: ERROR, payload: error.data.error.message });
 });

From the docs:

The response for a request contains the following information.

{
  // `data` is the response that was provided by the server
  data: {},

  // `status` is the HTTP status code from the server response
  status: 200,

  // `statusText` is the HTTP status message from the server response
  statusText: 'OK',

  // `headers` the headers that the server responded with
  headers: {},

  // `config` is the config that was provided to `axios` for the request
  config: {}
}

So the catch(error => ) is actually just catch(response => )

EDIT:

I still dont understand why logging the error returns that stack message. I tried logging it like this. And then you can actually see that it is an object.

console.log('errorType', typeof error);
console.log('error', Object.assign({}, error));

EDIT2:

After some more looking around this is what you are trying to print. Which is a Javascipt error object. Axios then enhances this error with the config, code and reponse like this.

console.log('error', error);
console.log('errorType', typeof error);
console.log('error', Object.assign({}, error));
console.log('getOwnPropertyNames', Object.getOwnPropertyNames(error));
console.log('stackProperty', Object.getOwnPropertyDescriptor(error, 'stack'));
console.log('messageProperty', Object.getOwnPropertyDescriptor(error, 'message'));
console.log('stackEnumerable', error.propertyIsEnumerable('stack'));
console.log('messageEnumerable', error.propertyIsEnumerable('message'));

Example

getUserList() {
    return axios.get('/users')
      .then(response => response.data)
      .catch(error => {
        if (error.response) {
          console.log(error.response);
        }
      });
  }

Check the error object for response, it will include the object you're looking for so you can do error.response.status

https://github.com/mzabriskie/axios#handling-errors