Monitor GA Client ID

cid_monitor.js

(function() {
    let ga_cid = document.cookie
        .split('; ')
        .find(row => row.startsWith('_ga='))
        ?.split('=')[1];

    // Listen for changes in the cookie store
    cookieStore.addEventListener('change', (e) => {
        e.changed.forEach(c => {
            if (c.name.startsWith('_ga')) {
                if (c.value !== ga_cid) {
                    ga_cid = c.value; // Update stored client ID
                    window.dataLayer.push({
                        event: 'ga_client_id_changed'
                    });
                    console.log(`Changed: ${c.name} = ${c.value}`);
                }
            }
        });
    });
})()