slides.md

title: YYCjs Slides output: index.html theme: theme controls: false logo: theme/logo.png

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NodeJS Like a Boss

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Brought to you by

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David Luecke

• daffl
• @daffl

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Eric Kryski

• ekryski
• @ekryski
• erickryski.com

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Our Sponsors

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Last Month

• Un-spaghetti and modularize your code
• Advanced selectors and DOM traversal
• Making your code faster
• Writing your own plugins
• Introduction to web components and Polymer
• Data driven views (or why direct DOM manipulation will be a thing of the past)
• Build web component style applications now with CanJS

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NodeJS

Node.js is a platform built on Chrome's V8 JavaScript runtime for easily building fast, scalable network applications.

• HTTP/HTTPS
• TCP/UDP Sockets
• Event Emitters
• Streams
• Files System Access
• Cross Platform

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How is Node Different?

It uses JavaScript and it has a single threaded event loop. There is a seperate thread pool for IO requests. (Image credited to Elegant Code)

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Modules

The __N__ode __P__ackage __M__anager

• currently hosts ~63,000 modules
• easy to use (npm install <package>)
• easy to publish (npm publish)
• use it with anything (folders, tarballs, git repositories)

CommonJS

• Attempt for JavaScript API standardization

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CommonJS modules

Provides global module, exports and require() to define this files API

// module1.js
exports.hello = 'World';
// or
module.exports = {
	hello: 'World'
}

Using the module

// main.js
var mod1 = require('./module1');

console.log(mod1.hello); // -> World

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package.json

CommonJS specification for describing JavaScript packages

{
	"name": "node-up",
	"version": "0.1.0",
	"author": "YYCJS <[email protected]>",
	"description": "Server side JavaScript FTW!",
	"scripts": {
		"test": "mocha test",
		"start": "node lib/main.js"
	},
	"main": "./lib/main.js",
	"repository": {
		"type": "git",
		"url": "https://github.com/yycjs/node-up"
	},
	"dependencies": {
		"somePackage": "> 1.0.0"
	},
	"devDependencies": {
		"some-dev-only-package":  "*"
	},
	"license": "MIT"
}

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Web Development

Create `example.js` like this:

var http = require('http');
http.createServer(function (req, res) {
	res.writeHead(200, {'Content-Type': 'text/plain'});
	res.end('Hello World\n');
}).listen(1337, '127.0.0.1');
console.log('Server running at http://127.0.0.1:1337/');

And run it like:

% node example.js
Server running at http://127.0.0.1:1337/

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Serving Static Files

var http = require("http");
var url = require("url");
var path = require("path");
var fs = require("fs");

http.createServer(function(request, response) {
	var uri = url.parse(request.url).pathname;
	var filename = path.join(process.cwd(), 'assets', uri);
	
	fs.readFile(filename, "binary", function(error, file) {
		if (error) {
			response.writeHead(500, {"Content-Type": "text/plain"});
			response.write(error + "\n");
			return response.end();
		}
		response.writeHead(200);
		response.write(file, "binary");
		response.end();
	});
}).listen(1337, '127.0.0.1');
console.log('Server running at http://127.0.0.1:1337/');

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Express

A sinatra inspired, web application framework. Its sort of the defacto.

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Socket.io

Bringing websockety goodness to your nodejs app. Has fallback to older technologies.

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Feathers

A minimal, real-time, data-driven, wrapper over top of Express that leverages the evented nature of nodejs.

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Next Month

• Optimizing your JS workflow
• Modules revisited
• AMD + RequireJS
• Component
• Browserify
• Grunt
• Gulp