How to Check if Axios Call Fails due to No Internet Connection?

[KaizenTamashi]

I'm trying to figure out an accurate way to detect axios call failure due to no internet connection.

Does axios call failure return a specific response object or specific response status code or throw a specific error details for the no internet connection scenario?

Example of what i will use the "detection of axios failure due to no internet connection" for

try {
    const res = await server.get('/auth/user?', {
            params: {
                refreshToken: refreshToken,            
                userID: userID
            }
        }
    );

    if(res.user.data){
        dispatch({type: LOGIN_USER_SUCCESS, payload: res.data.user});
    } else {
        if(res.axiosFailsDueToNoInternetConnection){
            alert('no internet connection');
            dispatch({type: RELOAD});
        }
    }

} catch (error) {
    if(error.dueToNoInternetConnection){
        alert('no internet connection');
        dispatch({type: RELOAD});
    }
}

[freakymittal]

You shouldn't rely on axios or any http library to determine the internet connectivity, cause it can't distinguish between No Internet and Server not reachable.

If you don't care about the difference between the 2 states, refer

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

If you want to check the network connectivity on browser, refer

https://developer.mozilla.org/en-US/docs/Web/API/NavigatorOnLine/onLine

[KaizenTamashi]

@mayank-mittal Thanks

[AidanHak]

If you're using Expo with React Native, there's a Network API.

[dozsolti]

Well, you kinda can't, at least not with axios, you have to use another library because:

axios timeout is response timeout, not connection timeout.
arthankamal - https://stackoverflow.com/a/54573024

But there is a workaround to wait some time and if there isn't a response it means that it will be an internet problem.
Check out here for an example: https://stackoverflow.com/a/70390385