crossbrowser tracking js errors using google analytics

ga-error-tracking.js

window.onerror = (message, filename, lineno, colno, error) => {

    function stack() {
        return (`${(error.stack).replace(/(\r\n|\n|\r)/gm," ")} in ${navigator.userAgent}`)
    }

    function nostack() {
        return (`${message} on line ${lineno} for ${filename} in ${navigator.userAgent}`)
    }

    function submitToGa(msg) {
        _gaq.push(["error._setAccount", "XX-XXXXXX-XX"]);
        _gaq.push(['error._trackEvent', 'Error', 'JS', msg]);
        if (window.console && console.log) {
            console.log(msg);
        }
    }

    if (error) {
        if (error.stack) {
            submitToGa(stack());
        } else {
            submitToGa(nostack())
        }
    } else {
        submitToGa(nostack())
    }
};