Using GA4 property with (gtag.js) following config:
gtag('js', new Date());
gtag('config', 'G-XXXXXXX', {
client_storage: 'none',
client_id: clientId, // I generate this
anonymize_ip: true,
});
And it still writes _ga and _ga_XXXXXXX cookies.
From what I found the flag client_storage=none only works for the old UA- properties, but for the new G- properties it doesn't have any effect.
The new way when using gtag is:
gtag("consent", "default", {
ad_storage: "denied",
analytics_storage: "denied",
functionality_storage: "denied",
personalization_storage: "denied",
security_storage: "denied"
});
The first two storage settings are documented here in the tag manager documentation and this support ticket mentions some additional settings that can be denied.
I tested this and it doesn't set a cookie any longer.
Apparently it breaks real-time analytics, but I do see regular data comming in after a day as usual.
The new G- properties it always has the data anonymized by default, so there is no need for the parameter anonymize_ip.
Anonymization tends to be used to assimilate the data from statistical to technical and to be able to track with Google Analytics.
Blocking tracking is not a good practice, inconsistent and unrepresentative data can be collected based on when the user accepts the cookie policy.
That kind of configuration (client_secure) works in UA while in GA4 doesn't work (at least currently). It is still an evolving system.
I have a react project and I call
ReactGA.gtag('consent', 'default', {
ad_storage: 'denied',
analytics_storage: 'denied',
functionality_storage: 'denied',
personalization_storage: 'denied',
security_storage: 'granted',
wait_for_update: 2000,
})
before the ReactGA.initialize method and it seems there are no cookies in the developer console. I don't see much into this. More context here
EDIT: Even tho the setting remove the cookies, it turned out the GA stopped tracking, so basically nothing worked.. :/