I am having a hard time removing a cookie when the logout button is clicked. I currently have a logout button with the class logout. and this is the simple jquery line I am trying to put to remove the cookie but it is not working.

$('button .logout').click(function () {

            $.cookie('userid', null);

       };

userid is the name of the cookie.

Oh I am using a signed cookie, not sure if that changes anything?

EDIT:

Here is how I set the cookie:

exports.loginPost = function(req, res, next) {

    console.log(here 1);

    passport.authenticate('local', function(err, user, info) {

        if (err) { return next(err) }

        if (!user) { 

            return res.render('loginError', {title: 'Weblio'}); }

        req.logIn(user, function(err) {

            if (err) { return next(err); }

            console.log(JSON.stringify(user));

            res.cookie('userid', user._id, { maxAge: 900000, signed: true });

            res.redirect('userProfile');

        });

  })(req, res, next);

};

And using a simple express - node js cookieParser with a secret in it.