Node.js Beyond The Basics Pdf 🆒

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

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.

// Using promises const fs = require('fs').promises; fs.readFile('file.txt') .then((data) => console.log(data.toString())) .catch((err) => console.error(err));

const passport = require('passport'); const LocalStrategy = require('passport-local').Strategy; node.js beyond the basics pdf

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

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

mkdir myproject cd myproject npm init

const assert = require('assert'); const greet = require('./greet');

Node.js is built around asynchronous programming using callbacks, promises, and async/await. Understanding how to work with asynchronous code is crucial for building efficient and scalable applications.

Node.js applications can be deployed to various platforms, including Heroku, AWS, and Google Cloud. const mongoose = require('mongoose'); mongoose

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

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

passport.serializeUser((user, done) => { done(null, user.username); }); Understanding how to work with asynchronous code is

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); } }));

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.