I want to add a custom script that integrates into an existing Tag Manager dataLayer on a page. I need this script to be notified about new dataLayer pushes.
So whenever something on the page uses window.dataLayer.push
, my script should be informed about this.
Is there a way to add a custom dataLayer event listener to the Google Script API?
I am looking for something like
google_tag_manager.dataLayer.onPush(callback);
google_tag_manager.dataLayer.subscribers
seems to list how many dataLayer subscribers there are - but how can I add my own?