Performance Tracking and Error Tracking in Google Analytics with Data Studio

Performance Tracking and Error Tracking in Google Analytics with Data Studio

So you want to track your performance and error tracking on your website? If you have Google Analytics installed already then you are half way there!

There are some amazing great 3rd party services out there, but if you only want the basics then this method is amazing for small personal websites.

Tracking Errors

To track errors on a website then its as simple as the below code.

First we check to see if the onerror object is available for us, if so on an error we fire a google event exception with the line number and error. Very simple and you can expand on this for modern browser APIs like shown here https://blog.sentry.io/2016/01/04/client-javascript-reporting-window-onerror

For more information on the exception Google Analytics event see the link below.

https://developers.google.com/analytics/devguides/collection/analyticsjs/field-reference#exDescription

if (typeof window.onerror === "object")
{
    window.onerror = function (err, url, line)
    {
        gtag('event', 'exception', {
            'exDescription': line + ': ' + err
        });
    };
}

Tracking Performance

For tracking performance I am using the incredibly awesome Perfume.js. Check out their site for a breakdown on everything it can do. This includes polyfills for older browsers and gives us a great starting point to start measuring metrics.

The setup is very straight forward and once you include their script you can start tracking with the code below.

For more information on the Google Analytics timing event, see the link below.

https://developers.google.com/analytics/devguides/collection/analyticsjs/field-reference#timingCategory

var perfume = new Perfume({
    firstPaint: true,
    firstContentfulPaint: true,
    firstInputDelay: true,
    timeToInteractive: true,
    logging: false,
    googleAnalytics: {
        enable: true,
        timingVar: "performance"
    }
})

Note: If you are using the more modern gtag installation of Google Analytics to track your user timings then the following code will work instead.

 var perfume = new Perfume({
    firstPaint: true,
    firstContentfulPaint: true,
    firstInputDelay: true,
    timeToInteractive: true,
    logging: true,
    analyticsTracker: function(metricName, duration) {
        gtag('event', 'timing_complete', {
            'name': metricName,
            'value': duration,
            'event_category': 'perfume'
            });
        }
    })

Producing a Dashboard

I have created a Dashboard for others to view, take a copy, link to their own Google Analytics account and amend as needed. Please feel free do so with this as you wish!

https://datastudio.google.com/open/1BqYvDZXowIb_dyc9u-1UzEPuqS_x1Chg

Once you have made a copy simply change the datasource and start playing. Hopefully this will give you a good starting point.