How long does a session last?

Question

Node.js

const session = require('express-session');
app.use(session({
  secret: 'qwe',
  resave: false,
  saveUninitialized: true,
  cookie: { secure: false }
}));

Please tell me, let's say I created a Cart property with a basket for the user in the session.
What will happen if the user minimizes the browser and puts the computer to sleep, and then expands the browser window in a week?
How long can a session be stored at most and how to set it up?
The cookie itself says: "When the browser session ends"