Despite EU directive, cookie laws across EU differ quite a lot in terms of how they define acceptable/unacceptable use. I added the following notice to the orig

Despite EU directive, cookie laws across EU differ quite a lot in terms of how they define acceptable/unacceptable use. I added the following notice to the original text to reflect this: Use this code (GitHub) to implement client-side Google Analytics without storing data on user's device (cookies, cache, local storage, Etags...). The solution still uses the data from client devices to facilitate user tracking. Please check cookie laws of your individual country to see if you can legally use this approach without user opt-in.