grav-labonneadresse.graphics/user/plugins/admin/themes/grav/templates/partials/javascript-config.html.twig

<script type="text/javascript">
    window.GravAdmin = window.GravAdmin || {};
    window.GravAdmin.config = {
        base_url_relative: '{{ base_url_relative }}',
        param_sep: '{{ config.system.param_sep }}',
        enable_auto_updates_check: '{{ config.plugins.admin.enable_auto_updates_check }}',
        admin_timeout: '{{ config.plugins.admin.session.timeout ?: 1800 }}'
    };
</script>