> For the complete documentation index, see [llms.txt](https://docs.umbraco.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.umbraco.com/umbraco-engage/17.latest/developers/analytics/client-side-events-and-additional-javascript-files/google-analytics-blocker-detection.md).

# Google Analytics Blocker Detection

When a visitor runs an Adblocker or cookieblocker the visitor is likely not tracked in Google Analytics. With Umbraco Engage you can still track this visitor.

This is made possible by a JavaScript file that you can include before the closing `body`-tag in your HTML:

```js
<script src="/Assets/Umbraco.Engage/Scripts/umbracoEngage.analytics.blockerdetection.js"></script>
```

{% hint style="info" %}
The following Google Analytics blocker detection script loading types are currently not supported: "async" or "defer".
{% endhint %}

If you include the script one of the following events is sent:

* If Google Analytics is blocked in the browser of the visitor: `umbEngage("send", "event", "Tracking", "Blocked", "Google Analytics");`
* Otherwise, the following event is sent: `umbEngage("send", "event", "Tracking", "Allowed", "Google Analytics");`

To see the statistics of this event go to the Analytics section of Umbraco Engage and open the 'Events' report. Look for the category with the name 'Tracking'.


---

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