How do I use Passport.js with Express.js for authentication?

How do I use Passport.js with Express.js for authentication?

To use Passport.js with Express.js, first install the necessary packages: passport, passport-local, and express-session. Then, set up your Express app to use sessions and initialize Passport.

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 passport = require('passport');
const LocalStrategy = require('passport-local').Strategy;

const app = express();

app.use(session({ secret: 'your_secret', resave: false, saveUninitialized: true }));
app.use(passport.initialize());
app.use(passport.session());

passport.use(new LocalStrategy((username, password, done) => {
    // Replace with your user authentication logic
}));

passport.serializeUser((user, done) => { done(null, user.id); });
passport.deserializeUser((id, done) => { /* Find user by ID */ });

app.listen(3000, () => console.log('Server running on http://localhost:3000'));

What about handling user registration?

For user registration, you can create a route that handles POST requests to save new users. Use a library like bcrypt to hash passwords before saving them.