Introduction Node.js
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This document provides an introduction to Node.js. It discusses why JavaScript can be strange, but explains that JavaScript is relevant as the language of the web. It then discusses what Node.js is and its event-driven, non-blocking architecture. Popular Node.js applications like HTTP servers, REST APIs, and web sockets are mentioned. Examples are provided of building a simple web app with Express and Jade, a REST API with Restify, and using web sockets with Socket.io. The document also discusses using Mongoose with MongoDB for data modeling.
Introduction Node.js
- 1. Introduction Node.js ERIK VAN APPELDOORN | MARCH 28TH 2014 | SDN EVENT
- 2. About me Erik van Appeldoorn Trainer | Consultant Avans Hogeschool, Academie Industrie & Informatica Twitter: @evappeld Blog: codeagainstthecode.tumblr.com Mail: [email protected]
- 3. Subjects
- 4. JavaScript WHY? Unstructured Not intuitive Unlogical Prototypical Inheritance… WTF? Dynamically typed No Intellisense/code completion Hard to debug Global variables
- 5. JavaScript is strange (I) console.log(1 == true); //true console.log(1 === true); //false console.log("0" == false); //true console.log("abc" == "a" + "b" + "c"); //true console.log(null == undefined); //true console.log(30 -"7"); //23 console.log("30" + 7); // 307
- 6. JavaScript is strange (II) function rectangle(x,y) { this.x = x; this.y = y; } rectangle.prototype.area = function() { return this.x * this.y; } var twoByThree = new rectangle(2,3); console.log(twoByThree.area());
- 7. But…JavaScript is relevant THE language of the WEB Cross-platform Huge REACH JavaScript is everywhere (client, server, libs, frameworks) Single Page Applications Server applications End-to-End JavaScript applications
- 9. JavaScript the good parts http://www.youtube.com/watch?v=hQVTIJBZook Dough Crockford
- 10. Learning JavaScript http://www.codecademy.com/tracks/javascript http://www.w3schools.com/js/default.asp http://eloquentjavascript.net/ Learn Node.js
- 11. What is Node.js? Open Source, Cross platform Development platform Uses V8 JavaScript engine (Google) “JavaScript on the server” Node.js is a command line tool
- 12. Node.js history Developed in 2009 Published in 2011 (Linux only) Ryan Dahl, Joyent From July 2011 Windows version available Active community: check http://nodeconf.com/
- 13. Node.js architecture Node.js is event-driven with Non-blocking I/O Uses a Event loop for Non-blocking I/O Node.js is single threaded
- 15. Node.js applications “Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications. Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient, perfect for data-intensive real-time applications that run across distributed devices.” HTTP server REST server Web Sockets TCP server Utillities Building Scalable Network programs
- 17. Hello Node.js World! + http server
- 19. Text editor JetBrains WebStorm Sublime Text Visual Studio + Node.js tools for Visual Studio Nodeclipse Cloud9
- 20. Node Package Manager (NPM) www.npmjs.org 60.000+ modules package.json file (npm init) npm install <module.name> --save DEMO
- 21. Polular NPM modules express mocha restify jade socket.io redis underscore mongoose moment request async connect grunt passport
- 23. Node.js Website with express + jade
- 24. Node.js Website with express + jade Express: http://expressjs.com/ Connect: http://www.senchalabs.org/connect/ Jade: http://jade-lang.com/ DEMO Connect
- 26. Features express: Views DEMO Express + Jade
- 27. Node.js REST API with Restify
- 28. Restify Maps HTTP verbs to CRUD operation Handles URL & Body params RESTIFY: http://mcavage.me/node-restify/
- 30. WebSockets
- 31. Node.js WebSockets with Socket.io
- 32. Socket.io Bi-directional communication WebSockets + fallbacks SOCKET.IO: http://socket.io/
- 34. Node.js with Mongoose & MongoDB
- 35. MongoDB NoSQL document store JSON collections MongoDB: http://www.mongodb.org/ Robomongo: http://robomongo.org/
- 36. Mongoose Object modelling for MongoDB Define schemas in Node.js for MongoDB Query building (ODM) Mongoose: http://mongoosejs.com/
- 37. Mongoose DEMO Mongoose & MongoDB
- 39. QUESTIONS?