analytics/lib/plausible_web/templates/layout/_tracking.html.heex

<%= on_full_build do %>
  <%= if !@conn.assigns[:skip_plausible_tracking] do %>
    <script
      defer
      data-api={PlausibleWeb.Dogfood.api_destination()}
      data-domain={PlausibleWeb.Dogfood.domain(@conn)}
      src={PlausibleWeb.Dogfood.script_url()}
    >
    </script>
    <script>
      window.plausible = window.plausible || function() { (window.plausible.q = window.plausible.q || []).push(arguments) }

      <%= if @conn.assigns[:dogfood_page_path] do %>
        const pageUrl = '<%= Path.join(plausible_url(), @conn.assigns[:dogfood_page_path]) %>'
      <% else %>
        const pageUrl = window.location.href
      <% end %>

      plausible('pageview', {
        u: pageUrl,
        props: {
          logged_in: <%= is_map(@conn.assigns[:current_user]) %>,
          theme: '<%= if @conn.assigns[:current_user], do: @conn.assigns[:current_user].theme, else: "system" %>',
          browser_language: navigator.language || navigator.userLanguage
        }
      })
    </script>
  <% end %>
<% end %>