Node.js is a JavaScript runtime built on Chrome's V8 JavaScript engine. It is used for building fast and scalable network applications like web servers. It provides event-driven, non-blocking I/O which makes it very fast. Some common uses of Node.js include writing highly concurrent server apps, building real-time apps that share data between server and client, and peer-to-peer web programming with websockets. Popular Node.js frameworks include Express, TowerJS, and tools include NPM, Jade, and Socket.IO. The presentation demonstrates Node.js's non-blocking callback model and how to install and use Node.js for simple HTTP and echo servers.

1. Node.js Introduction
Duong “Yang” H. Nguyen, @cmpitg
Fedora Ambassador, Certified Mozillian
Hanoi Community Space
cmpitg [at] gmail dot com
This document is licensed under the terms of
Creative Commons Non-commercial Share-Like 3.0 Unported

2. Agenda
What Node.js is and is not?
Why Node.js?
How to use? (with demo)
As a scripting engine
Best uses (briefly)
Frameworks/Tools
Questions

3. What Node.js is and is not?
Is/does
A framework
Providing evented, non blocking I/O
Built on top of Google's V8
JS environment
NOT
Very very fast!
A web framework:
–Ruby on Rails
– Django
– Yii
Multi-threaded

4. Why Node.js?
● Is JavaScript!
● Event-driven, non-blocking
● Fast as hell
● Easy to scale
● V8 is well supported by Google
● And fun!

5. Why Node.js?
Callback demo:
setInterval(function () {
console.log("Hello World")
}, 1000);
console.log("Done setting!");

6. How to use?
Installation:
Install Node.js
–
– Install NPM
– Install modules
Demos:
– Simple HTTP server
– Simple echo server

7. As a Scripting Engine
Modules:
– Processes & Child Process
– Filesystem
– Utilities
Docs: http://nodejs.org/api/

8. Best Uses
Writing highly concurrent server applications
Applications which share between server and
client
Peer-to-peer web programming using
websockets
And of course – highly concurrent web
programming

9. Frameworks/Tools
NPM – Node Package Manager
Express – Minimalistic MVC web framework
TowerJS – Rails-like web framework
Jade – Template engine
Socket.IO – Websocket library
… and much more!

10. Thank you for your attention!