How can I get the status code from an http error in Axios?

What you see is the string returned by the toString method of the error object. (error is not a string.)

If a response has been received from the server, the error object will contain the response property:

axios.get('/foo')
  .catch(function (error) {
    if (error.response) {
      console.log(error.response.data);
      console.log(error.response.status);
      console.log(error.response.headers);
    }
  });

As @Nick said, the results you see when you console.log a JavaScript Error object depend on the exact implementation of console.log, which varies and (imo) makes checking errors incredibly annoying.

If you'd like to see the full Error object and all the information it carries bypassing the toString() method, you could just use JSON.stringify:

axios.get('/foo')
  .catch(function (error) {
    console.log(JSON.stringify(error))
  });

With TypeScript, it is easy to find what you want with the right type.

This makes everything easier because you can get all the properties of the type with autocomplete, so you can know the proper structure of your response and error.

import { AxiosResponse, AxiosError } from 'axios'

axios.get('foo.example')
  .then((response: AxiosResponse) => {
    // Handle response
  })
  .catch((reason: AxiosError) => {
    if (reason.response!.status === 400) {
      // Handle 400
    } else {
      // Handle else
    }
    console.log(reason.message)
  })

Also, you can pass a parameter to both types to tell what are you expecting inside response.data like so:

import { AxiosResponse, AxiosError } from 'axios'
axios.get('foo.example')
  .then((response: AxiosResponse<{user:{name:string}}>) => {
    // Handle response
  })
  .catch((reason: AxiosError<{additionalInfo:string}>) => {
    if (reason.response!.status === 400) {
      // Handle 400
    } else {
      // Handle else
    }
    console.log(reason.message)
  })