GDG Lebanon node js course

1. Node JS crash course
Andre Abboud
@abboudandreh
Introduction | 8:00 pm

2. Node.js is an open-source and cross-platform
JavaScript runtime environment. It is a popular tool for
almost any kind of project!
Node.js runs the V8 JavaScript engine, the core of
Google Chrome, outside of the browser. This allows
Node.js to be very performant.
What is NodeJS?

3. Believe it or not, Node.js is only eleven years old.
In comparison, JavaScript is 24 years old and the Web is 31 years old.
Eleven years isn't a very long time in tech, but Node.js seems to have been
around forever.
A brief history of Node.js

4. A common task for a web server can be to open a file on the server and return the content to the client.
Here is how PHP or ASP handles a file request:
1. Sends the task to the computer's file system.
2. Waits while the file system opens and reads the file.
3. Returns the content to the client.
4. Ready to handle the next request.
Here is how Node.js handles a file request:
1. Sends the task to the computer's file system.
2. Ready to handle the next request.
3. When the file system has opened and read the file, the server returns the content to the client.
Node.js eliminates the waiting, and simply continues with the next request.
Node.js runs single-threaded, non-blocking, asynchronously programming, which is very memory efficient.
How NodeJS Works ?

5. ● Node.js can generate dynamic page content
● Node.js can create, open, read, write, delete, and close files on the server
● Node.js can collect form data
● Node.js can add, delete, modify data in your database
What you can do with NodeJS ?

7. Modules types
Modules are of three types:
● Core Modules
● local Modules
● Third-party Modules

8. NodeJS Core Modules

9. Example: Create an HTTP SERVER

10. NodeJS Local Modules

11. NPM is a package manager for Node.js packages, or modules if you like.
www.npmjs.com hosts thousands of free packages to download and use.
The NPM program is installed on your computer when you install Node.js
NPM

12. A package in Node.js contains all the files you need for a module.
Modules are JavaScript libraries you can include in your project.
What is a Package?

13. Your first node app
https://nodejs.org/
-Install node js
npm init
-Create node js project
Run node-v . Then Run npm -v
-Confirm node js installation
node file.js
-Create a .js file and run it

14. Express.js, or simply Express, is a back end web application framework for
Node.js, released as free and open-source software under the MIT License.
It is designed for building web applications and APIs. It has been called the
de facto standard server framework for Node.js.
Express

15. Or scan the QR code
Didn’t joined our whatsapp group?
Contact us on +96181105785

16. https://gdg.community.dev/e/mc46w
g/
RSVP for next session!
For North Lebanon
https://gdg.community.dev/e/m8cvg
n/
For other Lebanon areas