The RudderStack JavaScript SDK also enables you to filter and load your preferred destinations, and disable sending your events to other destinations. This way, you have full control over which third-party tools get access to your data. For example, you can send a specific set of events only to Google Analytics and Intercom, and disable sending those events to other destinations. The JavaScript SDK also enables sending a page view containing markers that indicate whether a page is ad-blocked or not. This way, you can analyze the data to find what percent of your site's page views are affected by ad-blockers. For more information, visit RudderStack's JavaScript SDK on GitHub.