how axios promise define errors

Question

I have some questions regarding promise and axios.

In the below axios example, I am wondering how is it defined to run the catch code.

Is it based on response http status code? like 400?

axios.get('/user?ID=12345')
  .then(function (response) {
    console.log(response);
  })
  .catch(function (response) {
    console.log(response);
  });

Thanks.

Clarkie Clarkie · Accepted Answer · 2016-05-13T14:55:09

My understanding is that if any sort of networking issue occurs or if an error code is responded from the server then the promise is rejected.

An error code from the server is either a client error (4XX) or server error (5XX). Status code definitions.

In the tests in the source code you can see what the maintainers are testing for when rejecting the promise.

how axios promise define errors

2 Answers