Track JavaScript errors using Universal Analytics from Google.

JS-error-tracking-with-GA.js

/**
 * Track JS error details in Universal Analytics
 */
 
function trackJavaScriptError(e) {
        var ie = window.event || {},
            errMsg = e.message || ie.errorMessage;
        var errSrc = (e.filename || ie.errorUrl) + ': ' + (e.lineno || ie.errorLine);
        ga('send', 'exception', {
            'exDescription': errSrc + ': ' + errMsg,
            'exFatal': false
        });
}
 
window.addEventListener('error', trackJavaScriptError, false);