overleaf/services/web/app/views/_google_analytics.pug

if (typeof(ExposedSettings.gaTokenV4) != "undefined" || typeof(ExposedSettings.gaToken) != "undefined")
    script(type="text/javascript", nonce=scriptNonce, id="ga-loader" data-ga-token=ExposedSettings.gaToken data-ga-token-v4=ExposedSettings.gaTokenV4 data-cookie-domain=ExposedSettings.cookieDomain data-session-analytics-id=getSessionAnalyticsId()).
        var gaSettings = document.querySelector('#ga-loader').dataset;
        var gaid = gaSettings.gaTokenV4;
        var gaToken = gaSettings.gaToken;
        var cookieDomain = gaSettings.cookieDomain;
        var sessionAnalyticsId = gaSettings.sessionAnalyticsId;
        if(gaid) {
            var additionalGaConfig = sessionAnalyticsId ? { 'user_id': sessionAnalyticsId } : {};
            window.dataLayer = window.dataLayer || [];
            function gtag(){
                dataLayer.push(arguments);
            }
            gtag('js', new Date());
            gtag('config', gaid, { 'anonymize_ip': true, ...additionalGaConfig });
        }
        if (gaToken) {
            window.ga = window.ga || function () {
                (window.ga.q = window.ga.q || []).push(arguments);
            }, window.ga.l = 1 * new Date();
        }
        var loadGA = window.olLoadGA = function() {
            if (gaid) {
                var s = document.createElement('script');
                s.setAttribute('async', 'async');
                s.setAttribute('src', 'https://www.googletagmanager.com/gtag/js?id=' + gaid);
                document.querySelector('head').append(s);
            } 
            if (gaToken) {
                (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
                (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
                m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
                })(window,document,'script','//www.google-analytics.com/analytics.js','ga');
                ga('create', gaToken, cookieDomain.replace(/^\./, ""));
                ga('set', 'anonymizeIp', true);
                if (sessionAnalyticsId) {
                    ga('set', 'userId', sessionAnalyticsId);
                }
                ga('send', 'pageview');
            }
        };
        // Check if consent given (features/cookie-banner)
        var oaCookie = document.cookie.split('; ').find(function(cookie) {
            return cookie.startsWith('oa=');
        });
        if(oaCookie) {
            var oaCookieValue = oaCookie.split('=')[1];
            if(oaCookieValue === '1') {
                loadGA();
            }
        }

if typeof(ExposedSettings.gaTokenV4) === "undefined"
  script(type="text/javascript", nonce=scriptNonce).
    window.gtag = function() { console.log("would send to GA4", arguments) };
if typeof(ExposedSettings.gaToken) === "undefined"
  script(type="text/javascript", nonce=scriptNonce).
    window.ga = function() { console.log("would send to GA", arguments) };