node express, how to clear cookie after log out

This is response.clearCookie of Express.JS (file response.js at line 749).

var opts = merge({ expires: new Date(1), path: '/' }, options);return this.cookie(name, '', opts);

If you set a breakpoint at this line you will see expires is reported at an invalid date. So instead of using response.clearCookie, just make it expire immediately like this one.

response.cookie("express.sid", "", { expires: new Date() });

This is working for me with cookie-parser module:

router.get('/logout', function(req, res){    cookie = req.cookies;    for (var prop in cookie) {        if (!cookie.hasOwnProperty(prop)) {            continue;        }            res.cookie(prop, '', {expires: new Date(0)});    }    res.redirect('/');});

What worked for me was adding path and domain in res.clearCookie

res.clearCookie(<cookie-name>, {path: '/', domain: <domain-on-which-cookie-is-set>}

Also, make sure to include credentials on the frontend, otherwise no cookie will be sent with the request. If no cookie goes to the server, it has nothing to clear!

fetch('url.com', {credentials: "include"}