How do sessions work under the hood?

Question

JavaScript

Good morning. Can you please tell me if there is a step-by-step guide for writing the same express-session from scratch? Is body-parser required and is it worth it for me to go here at all? Thank you.

Answer 1

there are only 4 files of 100-150 lines each (half jsdoc). Why do you need a manual when you can just pop in and see? There are comments, the principle is very simple.
https://github.com/expressjs/session/tree/master/s...

Answer 2

In fact, if you use the standard MemoryStore, then this is an object pool, where the session id (from the cookie) is the key to the session object in the Store
. In short, everything is stored in the object.