Gtag et Google Consent Mode

Voici comment paramétrer le widget des cookies avec le Google Consent Mode
Avec l'outil Gtag de Google, il est maintenant possible pour un nombre de solutions limités d'utiliser le Google Consent Mode, c'est à dire un système d'envoi de tags basé sur le consentement. Cette méthode actuellement en beta fonctionne pour l'instant uniquement avec Google Analytics, Floodlight, Google Ads et Conversion Linker.
Pour plus d'info à ce sujet, voir la doc de Google :
// google tools use queues to push information
// before their libraries are loaded. We need to
// define them if this code runs first
window.adsbygoogle = window.adsbygoogle || [];
window.dataLayer = window.dataLayer || [];
function gtag() {
// Axeptio use the same technique. _axcb holds the
// callback functions that will be executed when
// our lib is loaded
window._axcb = window._axcb || [];
// we pause ad requests by default
window.adsbygoogle.pauseAdRequests = 1;
// first we need to push a "js" command to the queue. This will
// register the exact time of the DOM being ready
// as stated here:
gtag("js", new Date());
// this must be the first thing to be sent to the dataLayer
// cf.
// "call the gtag('consent', 'default', ...) command on every page
// of your site before any commands that send measurement data
// (such as config or event)."
gtag("consent", "default", {
ad_storage: "denied",
analytics_storage: "denied",
wait_for_update: 1000,
// after that we wand to update the consent
// when the user gives his/her consent
window._axcb.push(function(axeptio) {
// now that axeptio is loaded, we add completion
// handler to execute when the user give his/her consent.
// this will also happen when we parse the axeptio_cookie
// which contains the preferences of a user
axeptio.on("cookies:complete", function(choices) {
// if you renamed your vendors in Axeptio's admin panel
// change the content of these variables.
var gaVendorName = 'google_analytics';
var adsVendorName = 'Google_Ads';
var consentSettings = {
ad_storage: "denied",
analytics_storage: "denied"
if (choices[gaVendorName]) {
consentSettings.analytics_storage = "granted";
// We decided to send a manual pageview to make sure
// we do not lose the first visit tracking information
gtag("send", "pageview");
if (choices[adsVendorName]) {
consentSettings.ad_storage = "granted";
} else {
//When ad_storage is set to 'denied', Google tags will not create or save cookies.
//However, you can optionally elect to pass information through URL parameters
//across pages in order to improve measurement quality.
gtag("set", "url_passthrough", true);
window.adsbygoogle.requestNonPersonalizedAds = 1;
// Finally, we update the Google Consent Mode variable to reflect
// the choice of the user
gtag("consent", "update", consentSettings);
// Ads can be resumed.
window.adsbygoogle.pauseAdRequests = 0;