NodeJS Difference between NodeJS vs JavaScript

1/1/1970

NodeJS Difference between NodeJS vs JavaScript

Difference between Node.js and JavaScript

  1. Definition

    • Node.js is a runtime environment that allows you to run JavaScript on the server side (outside the browser). ⭐
    • JavaScript is a scripting language primarily used for building interactive websites and runs inside a web browser.
  2. Environment

    • Node.js runs on the server (backend).
    • JavaScript runs in the browser (frontend).
  3. Use Case

    • Node.js is used for server-side applications, building REST APIs, handling databases, and more.
    • JavaScript is used for client-side tasks like updating the DOM, handling events, and creating dynamic web pages.
  4. Modules

    • Node.js uses CommonJS module syntax (e.g., require() for imports).
    • JavaScript (ES6) uses ES Modules (e.g., import/export).
  5. APIs

    • Node.js provides access to system-level APIs like file system, network, and OS-level operations.
    • JavaScript in browsers can only interact with the DOM, BOM, and perform basic network requests via fetch or XMLHttpRequest.
  6. Execution

    • Node.js runs on V8, Google’s JavaScript engine, outside the browser.
    • JavaScript runs within the browser’s environment (Chrome, Firefox, etc.).
  7. Global Objects

    • In Node.js, you have global, process, and Buffer.
    • In JavaScript, you have window, document, and navigator.
  8. Frameworks

    • Node.js supports frameworks like Express.js, Nest.js, and Koa.
    • JavaScript supports frameworks like React, Vue, and Angular.

Topics Under NodeJS and JavaScript

Topics Studied Under JavaScript (Frontend)

  1. Core JavaScript Concepts

    • Variables (let, const, var)
    • Data Types (String, Number, Boolean, Object, Array, etc.)
    • Operators (Arithmetic, Logical, Comparison)
    • Control Flow (if-else, switch, loops)
    • Functions (Declaration, Expression, Arrow Functions)
    • Scope (Global, Local, Block Scope)
    • Hoisting and Closures
  2. Advanced JavaScript

    • Asynchronous JS (Callbacks, Promises, Async/Await)
    • Event Loop and Microtasks/Macrotasks
    • Error Handling (try-catch, throw)
    • Prototypes and Inheritance
    • this Keyword and Context Binding
    • ES6+ Features (Destructuring, Spread/Rest, Template Literals)
    • DOM Manipulation (Document Object Model)
    • Event Handling (Bubbling, Capturing, Delegation)
  3. Browser-Specific Concepts

    • Browser Object Model (BOM)
    • Local Storage, Session Storage, Cookies
    • Fetch API, XMLHttpRequest (AJAX)
    • Web APIs (Geolocation, Notifications, etc.)
    • Form Validation and Input Handling

Topics Studied Under Node.js (Backend)

  1. Core Node.js Concepts

    • Node.js Architecture (Event-Driven, Non-blocking I/O)
    • Global Objects (process, Buffer, __dirname)
    • Module System (CommonJS - require(), module.exports)
    • File System (fs module - Read/Write Files)
    • Path Module (File Paths)
    • Streams (Readable, Writable, Transform)
    • Events (EventEmitter API)
  2. Asynchronous Node.js

    • Callbacks, Promises, Async/Await
    • Event Loop (Phases and Execution)
  3. HTTP and Networking

    • Creating HTTP Servers (http module)
    • Handling Routes and Middleware
    • Working with REST APIs (CRUD Operations)
    • WebSockets for Real-Time Communication
  4. Databases and Storage

    • Connecting to MongoDB, MySQL, PostgreSQL
    • Performing CRUD Operations
    • Using ORMs (Mongoose, Sequelize)
  5. Security and Authentication

    • Environment Variables (dotenv)
    • JWT Authentication
    • Input Validation and Sanitization
  6. Package Management

    • NPM (Node Package Manager) Basics
    • Creating and Publishing Packages
  7. Frameworks and Tools

    • Express.js (Routing, Middleware, APIs)
    • Socket.io (Real-Time Communication)
    • Nodemailer (Sending Emails)
  8. Performance and Optimization

    • Caching (Redis, Memory Cache)
    • Load Balancing and Clustering (cluster module)