detect-status.js

// depends on js-cookie.js: https://github.com/js-cookie/js-cookie
//
$(function(){
  var user_logged_in = function() {
    if(Cookies.get('auth_type')) {
      console.log('user is logged in');
      $(".menu-item > a[href|='/login']").replaceWith('<a title="Main Site" href="/">Main Site</a>');
      $(".menu-item > a[href|='/signup']").hide();
    } else {
      console.log('user is _not_ logged in');
      $(".menu-item > a[href|='/'").replaceWith('<a title="Log in" href="/login">Log in</a>');
      $(".menu-item > a[href|='/signup']").show();
    }
  };
  console.log(user_logged_in());
});