How to set a cookie in a subdomain and access it from another subdomain within the same domain?

Question

I am deploying the backend on a server using a subdomain and the frontend on another subdomain. However, the cookies are not being set for the frontend. I have tried using the domain: '.domain.com' option to set the cookies, but it is not working. Can anyone help me figure out what the issue might be?

I tried the solutions and still the cookie was not set:

res.cookie('myCookie', 'myValue', { domain: '.example.com' });

res.cookie('myCookie', 'myValue', { domain: '.example.com', path: '/', secure: true });

What hosting provider are you using? – Lin Du Jun 14 '23 at 12:05 — Lin Du, Jun 14 '23 at 12:05

score 0 · Answer 1 · edited Jun 15 '23 at 15:59

This may answer your question https://stackoverflow.com/a/23086139/22070854, but I think you forgot to specify the expiry date of the cookie.

Assuming you use express, you can do this:

res.cookie('cookieName', 'cookieValue', {

  // the domain name
  domain: '.domain.com',

  // the expiry time relative to the current time (in milliseconds), 1 hour here
  maxAge: 1000 * 60 * 60,

  // the path
  path: '/'
});

How to set a cookie in a subdomain and access it from another subdomain within the same domain?

1 Answers1