How to Detect user is active or idle on web page Using JQuery ? From https://arjunphp.com/detect-user-is-active-or-idle-on-web-page-using-jquery/

user_idle.js

 $(document).ready(function () {
        var idleState = false;
        var idleTimer = null;
        $('*').bind('mousemove click mouseup mousedown keydown keypress keyup submit change mouseenter scroll resize dblclick', function () {
            clearTimeout(idleTimer);
            if (idleState === true) {
                $("body").css('background-color','#fff');            
            }
            idleState = false;
            idleTimer = setTimeout(function () {
                $("body").css('background-color','#000');
                idleState = true; }, 2000);
        });
        $("body").trigger("mousemove");
    });
// - See more at: https://arjunphp.com/detect-user-is-active-or-idle-on-web-page-using-jquery/#sthash.p4P2lGUP.dpuf