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Node.js Beyond The Basics Pdf Page

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); } }));

Node.js is a JavaScript runtime built on Chrome's V8 JavaScript engine that allows developers to create scalable and high-performance server-side applications. Node.js provides an event-driven, non-blocking I/O model that makes it lightweight and efficient.

Node.js applications can be deployed to various platforms, including Heroku, AWS, and Google Cloud.

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

// Using async/await const fs = require('fs').promises; async function readFile() { try { const data = await fs.readFile('file.txt'); console.log(data.toString()); } catch (err) { console.error(err); } }

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

// Creating a module // greet.js module.exports = function greet(name) { console.log(`Hello, ${name}!`); }; passport

const express = require('express'); const app = express();

const User = mongoose.model('User', userSchema);

app.listen(3000, () => { console.log('Server listening on port 3000'); }); // Using callbacks fs

mkdir myproject cd myproject npm init

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