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 errMsg = e.message;
  var errSrc = e.filename + ': ' + e.lineno;
  ga('send', 'event', 'JavaScript Error', errMsg, errSrc, { 'nonInteraction': 1 });
}
 
window.addEventListener('error', trackJavaScriptError, false);

for compatibility( IE9 and blow), the code should be this:

function trackJavaScriptError(e) {
        var ie = window.event,
            errMsg = e.message || ie.errorMessage;
        var errSrc = (e.filename || ie.errorUrl) + ': ' + (e.lineno || ie.errorLine);
        ga('send', 'event', 'JavaScript Error', errMsg, errSrc, { 'nonInteraction': 1 });
}

If an error comes from a different domain, you don't have e.filename. So your script is accessing ie.filename. If you have a firefox, it's crashing, because ie is not defined. I changed the second line of your script. Now it's working correctly with errors from different domains.

function trackJavaScriptError(e) {
        var ie = window.event || {},
            errMsg = e.message || ie.errorMessage;
        var errSrc = (e.filename || ie.errorUrl) + ': ' + (e.lineno || ie.errorLine);
        ga('send', 'event', 'JavaScript Error', errMsg, errSrc, { 'nonInteraction': 1 });
}

FYI http://stackoverflow.com/questions/21718481/report-for-exceptions-from-google-analytics-analytics-js-exception-tracking

Universal Analytics have exception tracking support: https://developers.google.com/analytics/devguides/collection/analyticsjs/exceptions

So the code should look like this:

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
        });
}

@kdzwinel i tried your code but its not working for me. what i noticed its not able to grab the error