openproject/modules/openid_connect/app/views/session/_warn_logout.js.erb

// window.parent == OpenProject window
var op = window.parent;
var $ = op.jQuery
var back_url = encodeURIComponent(op.document.location.href);

$.ajax({
    url: "/session/logout_warning?back_url=" + back_url,
    cache: false,
    success: function(html) {
      $("#logout-warning").remove();
      $(html).prependTo("body").hide().slideDown();
      $('html, body').animate({
        scrollTop: $("#logout-warning").offset().top
      }, 1000);
    }
});