window.onerror.js

window.onerror = function (message, url, lineNo) {
    try { 
        var xhr = new (window.XMLHttpRequest || ActiveXObject)('MSXML2.XMLHTTP.3.0'),
            domain ='https://example.com/',
            query = '?line=' + lineNo +
                    '&message=' + message + 
                    '&url=' + url +
                    '&UA=' + window.navigator.userAgent;
        xhr.open('GET', domain + query, true);
        xhr.send();
    } catch (s) {}
    return true;
};