Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Module, AMD, RequireJS
Search
othree
May 19, 2012
Technology
11
4k
Module, AMD, RequireJS
othree
May 19, 2012
Tweet
Share
More Decks by othree
See All by othree
How GitHub Supports Vim License Detection, The Five Years Journey
othree
1
1.6k
WAT JavaScript Date
othree
3
1.8k
Modern HTML Email Development
othree
3
2.5k
MRT & GIT
othree
1
1.8k
YAJS.vim and Vim Syntax Highlight
othree
1
2.4k
Web Trends to 2015
othree
4
280
Transducer
othree
9
2.6k
HITCON 11 Photographer
othree
4
450
fetch is the new XHR
othree
6
3.4k
Other Decks in Technology
See All in Technology
PHPerKaigi 2024 - PHP 本体のバグを見つけたら適切に報告しよう
zeriyoshi
0
750
Server-Side Kotlin + Spring Boot + Exposedでやったこと
ikefukurou777
0
110
EKSの認証認可の仕組みとEKS APIを用いた認可制御について
daitak
0
250
Proposal for a fictitious company presented by JAWS-UG DE&I team 'Naniwa Musume'
hiroramos4
PRO
0
120
Autonomous Database - Dedicated 技術詳細 / adb-d_technical_detail_jp
oracle4engineer
PRO
2
4.9k
なんでもかんでもコンテナ化すればいいってもんでもないけど なんでもかんでもコンテナ化したらスッキリしました
saramune
1
160
事業部を超えた 開発生産性向上に挑戦する
kentakozuka
2
110
「わたしたちのコード」を安定させるためにフレームワークとの距離を保つ / phperkaigi2024
blue_goheimochi
5
790
【OpenAI本出版記念】npakaによるOpenAI最新技術情報と技術情報キャッチアップ術
npaka
8
1.4k
プレイヤーとしてのチームのテスト力UP/Improving team skills for testing
goyoki
2
220
Webエンジニアのためのデータエンジニアリング概説
mtoriyama000
5
400
人工衛星管制システムにおけるCICD / CICD in satellite control systems
iselegant
4
890
Featured
See All Featured
5 minutes of I Can Smell Your CMS
philhawksworth
199
19k
ParisWeb 2013: Learning to Love: Crash Course in Emotional UX Design
dotmariusz
101
6.6k
It's Worth the Effort
3n
180
27k
Responsive Adventures: Dirty Tricks From The Dark Corners of Front-End
smashingmag
242
20k
Rails Girls Zürich Keynote
gr2m
91
13k
Design and Strategy: How to Deal with People Who Don’t "Get" Design
morganepeng
113
18k
I Don’t Have Time: Getting Over the Fear to Launch Your Podcast
jcasabona
19
1.6k
The World Runs on Bad Software
bkeepers
PRO
60
6.6k
Writing Fast Ruby
sferik
619
59k
Building Applications with DynamoDB
mza
88
5.5k
Being A Developer After 40
akosma
56
580k
Why Our Code Smells
bkeepers
PRO
330
56k
Transcript
Module, AMD, RequireJS othree @ JSDC 2012
Object
Object Oriented Programming
Why OOP • Maintainable & Scalable • Gathering related variables
& methods
Object from OOP • Inheritance • Polymorphism • Encapsulation
Encapsulation • A language mechanism for restricting access to some
of the object's components. http://en.wikipedia.org/wiki/Encapsulation_(object-oriented_programming)
Why Encapsulation • Protect variable from unwanted change
JavaScript is Prototype-based
Private Data in JavaScript
Naming Convention function Human(sgender) { //Private this._age = 1; this._gender
= sgender || 'Male'; //Public this.growUp = function () { this._age++; }; }
Human _age _gender growUp Accessible Anywhere
Privileged Method function Human(sgender) { //Private var age = 1,
gender = sgender || 'Male'; //Privileged Method this.growUp = function () { age++; }; } http://javascript.crockford.com/private.html
Human age gender growUp Accessible Anywhere
Module Pattern
Module Pattern function Human(sgender) { //Private var age = 1,
gender = sgender || 'Male'; //Public return { growUp: function () { age++; } }; } http://yuiblog.com/blog/2007/06/12/module-pattern/
Accessible Anywhere exports Human age gender growUp
Advantage • Easy • Keep private data safe
Disadvantage • Hard to inherit
Large Application • Lots of modules • Complex dependency
Lots of Modules • One file per module • Lots
of files: • Performance Issue • Async loading?
Complex Dependency • Load modules by order • Hard to
know the order by head and hand
Solution? • Not hard to solve • But there is
no standard API
CommonJS
CommonJS • by Kevin Dangoor • Volunteers and mailing list
• Unify server side JavaScript API • Build JavaScript ecosystem • Not an official organization
CommonJS APIs • Binary • Filesystem • IO • ...
• Modules
None
CommonJS Module • Modules/1.0 • NodeJS • Modules/AsynchronousDefinition • AMD
AMD
Asynchronous Module Definition define(id?, dependencies?, factory);
Example define( 'account', ['service', 'pubsub'], function (service, pubsub) { //do
something //export public APIs return { signin: function () { /* ... */ }, signout: function () { /* ... */ }, getName: function () { /* ... */ }, setName: function () { /* ... */ } }; } );
Another Way (function () { //10000 lines of code exports
= { signin: function () { /* ... */ }, signout: function () { /* ... */ } }; define('account', function () { return exports; }); }());
In jQuery if ( typeof define === "function" && define.amd
&& define.amd.jQuery ) { define( "jquery", [], function () { return jQuery; } ); }
RequireJS
RequireJS • AMD Implementation by James Burke • Async resource
loader • 1.0.8 now, 2.0 under development
Usage <script data-main="main" src="require.js"></script>
main.js require(["app"], function(app) { app.init(); });
app.js define(["lib/account", "lib/session"], function (account, session) { //do something return
{ init: function () { //init the application } }; } );
main.js account.js app.js session.js crypt.js xhr.js storage.js
Features • AMD • Path alias • Circular dependency •
Plugins
Plugins • order • text • wrap, use • cs
(CoffeeScript)
Advantages • No pollution to global scope • Everything is
organized in module • Compile CoffeeScript on the fly • ...etc
Minefield • Module load fail: hard to debug • Wrong
path • Use require function • Plugin error, ex: CoffeeScript syntax error
Still Problems • Lots of modules • Lots of files
• Lots of requests • Low performance
r.js
r.js • Optimization tool • Pack all modules into one
file • Minimize the JavaScript file
Usage node r.js -o build.js
build.js ({ appDir: "../", baseUrl: "scripts", dir: "../../appdirectory-build", modules: [
{ name: "main" } ] })
main.js account.js app.js session.js crypt.js xhr.js storage.js
After Optimized • require.js are large: 86kb
almond.js
almond.js • Minimal AMD API implement • Same author
Advantages • Small: 9kb, 857 bytes minimized and gzipped •
Stable: no change since 0.0.3
Disadvantages • No plugin support • Not a resource downloader
• Lots of restriction • Different optimize concept
Usage node r.js -o baseUrl=. name=path/to/almond.js include=main out=main-built.js wrap=true
Tip • You can use r.js to optimize • And
use almond.js to replace require.js
<script src="almond.js"></script> <script src="main-optimized.js"></script>
References • http://www.yuiblog.com/blog/2007/06/12/module-pattern/ • http://wiki.commonjs.org/wiki/Modules/1.1 • http://wiki.commonjs.org/wiki/Modules/AsynchronousDefinition • https://github.com/amdjs/amdjs-api/wiki/AMD •
http://requirejs.org/ • https://github.com/jrburke/almond
None
Questions Time
Q • I want to use Underscore and Backbone, but
they don’t support RequireJS....
A • Do nothing • Use use/wrap plugin • Use
modified version https://github.com/jrburke • Use another script tag to include them first
<script src="undersocre+backbone.js"></script> <script src="almond.js"></script> <script src="main-optimized.js"></script>
<script src="yepnope.js"></script> <script> yepnope({ load: [ "undersocre+backbone.js", "almond.js", "main-optimized.js" ]
}); </script>
Questions?
Thank You