How do sessions work in Express.js with Node.js?

Question

Using Express.js, sessions are dead simple. I\'m curious how they actually work though.

Does it store some cookie on the client? If so, where can I find that cookie?

Answer 1

In addition to already excellent answers, here are 2 diagrams I've created to explain Express sessions, their link with cookies and store :

• chocolate cookie:
• strawberry cookie: