Basics Pdf | Node.js Beyond The

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

mkdir myproject cd myproject npm init

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); } }));

describe('Greet function', () => { it('should greet a person', () => { assert.strictEqual(greet('John'), 'Hello, John!'); }); }); node.js beyond the basics pdf

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

Node.js provides various testing frameworks, including Mocha and Jest.

const passport = require('passport'); const LocalStrategy = require('passport-local').Strategy; // Using callbacks fs

To start a new Node.js project, create a new directory and initialize a new project using npm init . This will create a package.json file that will be used to manage dependencies and scripts.

Node.js can be used with various databases, including MongoDB, PostgreSQL, and MySQL. Mongoose is a popular ORM for MongoDB.

Node.js can be used to build scalable and high-performance RESTful APIs. Express.js is a popular framework for building web applications in Node.js. Express

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

Node.js provides a built-in module system that allows developers to organize and reuse code. Dependencies can be managed using npm or yarn.

// 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); } }