Response status = 0 using fetch polyfill with mode: 'no-cors'

const BASE_CONFIG = {
    credentials: 'include',
    mode: 'no-cors'
};

let checkStatus = (response) => {
    if (response.status >= 200 && response.status < 300) {
        return response;
    } else {
        var error = new Error(response.statusText);
        error.response = response;
        throw error;
    }
};

function GET(url, urlParams={}, config={}) {
    let requestConfig = {
        method: 'get'
    };
  
    Object.assign(requestConfig, BASE_CONFIG, config);
    return fetch(url, requestConfig)
            .then(checkStatus)
            .then(parseJSON);
}

GET('http://other.domain,{})

function getData(req, res) {
    var responseData = {data: 'test'};
    res.header("Access-Control-Allow-Origin", "*");
    res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
    res.writeHead(200, {"Content-Type": "application/json"});
    return res.end(JSON.stringify(responseData));
}