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Summary Node.js programming language notes
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  • Course
  • CS8501
  • Institution
  • Anna University,CEG,chennai-600025

Discover everything you need to know about N in this comprehensive guide. Learn N basics, core concepts, practical examples, and best practices. Master N programming and build efficient, scalable applications.

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Document information

  • September 30, 2024
  • 3
  • 2024/2025
  • Summary

Subjects

  • nodejs notes
  • nodejs tutorial
  • nodejs documentation
  • nodejs basics
  • nodejs programming language notes

Written for

  • Anna University,CEG,chennai-600025
  • CS8501
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Node.js Overview
1. Introduction to Node.js

What is Node.js: Node.js is a JavaScript runtime built on Chrome's V8 JavaScript engine, designed

for building fast and scalable network applications.

History of Node.js: Node.js was created by Ryan Dahl in 2009, revolutionizing server-side

development by enabling JavaScript to be used outside the browser.

Key Features: Node.js is known for its non-blocking, event-driven architecture, making it efficient for

building real-time applications like chat servers and APIs.

2. Asynchronous Programming in Node.js

Event-Driven Architecture: Node.js uses an event-driven, non-blocking I/O model that allows for

handling many connections simultaneously.

Callbacks: Callbacks are functions passed as arguments to other functions, executed once the

asynchronous operation completes.

Promises and Async/Await: Node.js supports modern asynchronous patterns using Promises and

async/await, providing more readable and maintainable code.

3. Modules in Node.js

CommonJS Modules: Node.js uses the CommonJS module system, where each file is treated as a

module. Modules are imported using require() and exported using module.exports.

Built-in Modules: Node.js provides built-in modules like http, fs (file system), path, and events,

offering functionality for network, file, and system operations.

Creating Custom Modules: Developers can create custom modules in Node.js by organizing code

into separate files and exporting them as reusable components.

4. HTTP Server in Node.js

Creating an HTTP Server: The http module in Node.js allows for creating an HTTP server using the

createServer() function.

Handling Requests and Responses: Node.js processes incoming HTTP requests and sends

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