How can I use session storage in Express.js?

How can I use session storage in Express.js?

You can use the express-session middleware to manage session storage in your Express.js application.

What do I need to install to get started?

You need to install the express-session package using npm. Run npm install express-session.

Can you show me a basic example of how to set it up?

Sure! Here's a simple setup:

const express = require('express');
const session = require('express-session');

const app = express();

app.use(session({
  secret: 'your-secret-key',
  resave: false,
  saveUninitialized: true,
}));

app.get('/', (req, res) => {
  req.session.views = (req.session.views || 0) + 1;
  res.send(`Number of views: ${req.session.views}`);
});

app.listen(3000, () => {
  console.log('Server is running on port 3000');
});

What is the purpose of the secret key?

The secret key is used to sign the session ID cookie, ensuring that the session data is secure and cannot be tampered with.