want to share passport.js session to root and other subdomains

Question

I create the passport session on sub.domain.com. I want to use this session on domain.com.

I tried setting session-cookie, like so:

app.use(
  session({
    cookie: {
      path: '/',
      domain: 'domain.com'   // also tried '.domain.com' 

The cookie that passport created always has sub.domain.com, and seems to ignore the above code all together. What am I doing wrong?

Answer 1

The answer was to put the domain outside the cookie block:

app.use(
  session({
  domain: '.domain.com'  //!important
    cookie: {
      path: '/',
      domain: '.domain.com'