error.response undefined in simple interceptor

Axios v0.17.1

instance.interceptors.response.use(res => res, error => {
  console.log('ERROR');
  console.log(error);
  console.log('response:');
  console.log(error.response);
});

result

ERROR
index.js:47 Error: Network Error
    at createError (createError.js:16)
    at XMLHttpRequest.handleError (xhr.js:87)
index.js:48 response:
index.js:49 undefined

confused at to why this is happening, i’m trying to retry requests based on error.response.status but error.response isn’t always defined. Is this expected behaviour? If so what is your recommended fix?

[AllanPinheiroDeLima]

I’m running this issue too. I want to control user logged in state into interceptors. For instance, if my interceptors catch a response with status 401, I want to logoff / redirect this user.

[olafal0]

@SeeThruHead I had this issue when the response did not include the Access-Control-Allow-Origin header. The error response was received, but disallowed by CORS. When that happens, it looks like axios doesn’t actually set error.response, even though there was a received response.

So, at least in my case, the fix was to make sure Access-Control-Allow-Origin: * was included in the response’s headers when there was an error.