Node js for beginners
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An absolute beginners guide to node.js . Done for a presentation at college. The presentation contains data from various sources ,sources are noted at the end slide. please inform me any mistakes ,since at that time i was in a bit of hurry :)
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Node js for beginners
- 1. S Arjun S4 BCA Amrita University,Kollam
- 2. ★ Javascript & the V8 Engine ★ Intro to node js ★ Features of Node js ★ Examples of Node js ★ Node js in the industry ★ How to install ★ NPM ★ Hello world ★ Frameworks and Extensions ★ Future learning ★ References What’s going to be covered?
- 3. javascript ● Browser side programming ● Event handling on the client side ● Adding interactivity to web pages
- 5. ● v8 is a super fast javascript library built by google for chrome ● Compiles javascript directly into machine code instead of interpreting ● JIT(Just In Time ) compilation ● Written in c++
- 6. what the js is node? ● Node.js = javascript +google v8 on the server ● Additional features for javascript to run on the server ● Handle server side events ● Cross operating system compatible
- 7. What makes node better?
- 8. Event driven ● Just like javascript events on the client,Node can handle various events on the server ● Examples of server events are,file transfer,request for a page,loading content from database
- 10. Non blocking I/O ● Traditional applications waits for a set code to complete before it displays the content.This is called blocking code ● in non blocking Once the request is made we continue on to the next line of code before waiting for the time consuming request to finish ● Uses callback functions to handle non blocking code
- 11. Scalable ● Node applications are highly scalable ● Horizontal scaling of servers ● Adding more servers instead of increasing the performance of each
- 13. what we can make with node? ● Real time chat applications ● Upload huge amounts of data ● Data streaming applications ● Distributed ,clustered systems and embedded systems ● Applications that can handle millions of concurrent connections . ● Control Robots and drones through WLAN
- 14. who uses node.js And many more...
- 15. A little bit of History ● Node.js was invented in 2009 by Ryan Dahl ● inspired to create Node.js after seeing a file upload progress bar on Flickr ● Opensource,sponsored by Joyent and microsoft ● Ryan was a mathematics student and dropped out of college.
- 16. Installing node.js ● for windows download the exe https://nodejs.org/download/ ● On linux just type sudo apt-get install nodejs sudo apt-get install npm
- 17. NPM node package manager ● Node package manager(NPM) is a component of node js ● NPM fetches packages just like apt-get in ubuntu ● Packages are plugins or commonly used modules that add more functions to node.Just like beans in java ● NPM manages the dependency of the packages.
- 18. HELLO world! var http = require('http'); http.createServer(function (req, res) { res.writeHead(200, {'Content-Type': 'text/html'}); console.log("The server just go a request"); res.write("Hello world"); res.end(); }).listen(9615);
- 19. FRAMEWORKS & EXTENSIONS ● Express.js web application framework similar to python django or ruby on rails ● Cyclon.js Building WLAN/internet controlled robots and drones using node.js ● Sails.js MVC web application frameworks ● Socketstream Real Time applications .
- 20. Moving ahead! ● The best way to learn node is to use and interactive tutorial called nodeschool ● Available as an Npm package : npm install -g learnyounode ● Official node.js documentation
- 21. References ● Official Node.js Documentation ● Nodeschool.io ● Wikipedia ● Node.js presentation by Gabriele Lana ● Toptal.com,code.tutsplus.com,Google developers
- 22. THANK YOU