hedgedoc/public/views/shared/ga.ejs

<% if(typeof GA !== 'undefined' && GA) { %>
<script nonce="<%= cspNonce %>">
(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', 'https://www.google-analytics.com/analytics.js', 'ga');

ga('create', '<%= GA %>', 'auto');
ga('send', 'pageview');
</script>
<% } %>