Node.js Beyond The Basics Pdf May 2026

const user = new User({ name: 'John', age: 30 }); user.save((err) => { if (err) { console.error(err); } else { console.log('User saved successfully'); } });

// Using callbacks fs.readFile('file.txt', (err, data) => { if (err) { console.error(err); } else { console.log(data.toString()); } }); node.js beyond the basics pdf

describe('Greet function', () => { it('should greet a person', () => { assert.strictEqual(greet('John'), 'Hello, John!'); }); }); const user = new User({ name: 'John', age: 30 }); user

passport.use(new LocalStrategy((username, password, done) => { // Verify user credentials if (username === 'john' && password === 'password') { return done(null, { username: 'john' }); } else { return done(null, false); } })); age: 30 })

passport.serializeUser((user, done) => { done(null, user.username); });

const mongoose = require('mongoose'); mongoose.connect('mongodb://localhost/mydatabase', { useNewUrlParser: true, useUnifiedTopology: true });