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
Your Code Sucks: Best Practices for Enterprise ...
Search
Arthur Kay
August 15, 2012
Programming
8
2.6k
Your Code Sucks: Best Practices for Enterprise JavaScript Development
From ThatConference 2012
Arthur Kay
August 15, 2012
Tweet
Share
More Decks by Arthur Kay
See All by Arthur Kay
Analyzing the ROI of JavaScript in Enterprise Software Development
arthurakay
0
150
Debugging your Apps with Google Chrome and Sencha
arthurakay
1
260
Announcing Ext JS 5
arthurakay
0
130
Conquering the Command Line
arthurakay
0
300
The Future of Enterprise App Development
arthurakay
0
130
Best Practices for Enterprise JavaScript Applications
arthurakay
7
2.5k
Bringing the Mobile Web to the Cloud
arthurakay
2
550
Building Native Windows 8 Apps with Sencha
arthurakay
0
250
Creating Windows 8 Apps with Ext JS
arthurakay
1
280
Other Decks in Programming
See All in Programming
MDN Web Docs に日本語翻訳でコントリビュートしたくなる
ohmori_yusuke
1
120
Blazing Fast UI Development with Compose Hot Reload (droidcon New York 2025)
zsmb
1
290
プロダクト志向なエンジニアがもう一歩先の価値を目指すために意識したこと
nealle
0
130
iOS 26にアップデートすると実機でのHot Reloadができない?
umigishiaoi
0
130
脱Riverpod?fqueryで考える、TanStack Queryライクなアーキテクチャの可能性
ostk0069
0
120
PostgreSQLのRow Level SecurityをPHPのORMで扱う Eloquent vs Doctrine #phpcon #track2
77web
2
530
ニーリーにおけるプロダクトエンジニア
nealle
0
830
Systèmes distribués, pour le meilleur et pour le pire - BreizhCamp 2025 - Conférence
slecache
0
120
スタートアップの急成長を支えるプラットフォームエンジニアリングと組織戦略
sutochin26
1
5.5k
猫と暮らす Google Nest Cam生活🐈 / WebRTC with Google Nest Cam
yutailang0119
0
120
Node-RED を(HTTP で)つなげる MCP サーバーを作ってみた
highu
0
120
ISUCON研修おかわり会 講義スライド
arfes0e2b3c
1
440
Featured
See All Featured
Done Done
chrislema
184
16k
The Illustrated Children's Guide to Kubernetes
chrisshort
48
50k
Practical Orchestrator
shlominoach
189
11k
Mobile First: as difficult as doing things right
swwweet
223
9.7k
Optimizing for Happiness
mojombo
379
70k
Helping Users Find Their Own Way: Creating Modern Search Experiences
danielanewman
29
2.7k
Side Projects
sachag
455
42k
A Modern Web Designer's Workflow
chriscoyier
695
190k
Fight the Zombie Pattern Library - RWD Summit 2016
marcelosomers
233
17k
Build your cross-platform service in a week with App Engine
jlugia
231
18k
Designing Experiences People Love
moore
142
24k
Let's Do A Bunch of Simple Stuff to Make Websites Faster
chriscoyier
507
140k
Transcript
Best Practices for Enterprise JavaScript Applications YOUR CODE SUCKS
WHO AM I? • Arthur Kay • Solutions Engineer @
Sencha, Inc. • Web Development ~15 years • www.akawebdesign.com • @arthurakay
AGENDA • Improving application performance • Increasing code stability •
Scaling applications for enterprise • Tools • Advice
None
IMPROVING APPLICATION PERFORMANCE Part 1
CACHING
THIS CODE SUCKS
DO THIS INSTEAD • Cache values (references) • Avoid using
document.getElementById() and other global queries
DO THIS INSTEAD
OVER NESTING
THIS CODE SUCKS
DO THIS INSTEAD • Use lightweight containers (reduce DOM) •
Lazy Rendering
DO THIS INSTEAD
MEMORY LEAKS
THIS CODE SUCKS
DO THIS INSTEAD
INCREASING CODE STABILITY Part 2
SYNTAX ERRORS
THIS CODE SUCKS
DO THIS INSTEAD • Use JSLint (or something else) •
AUTOMATE SYNTAX CHECKING
ONE CLASS PER FILE
THIS CODE SUCKS
DO THIS INSTEAD • Organize your file system • Files
and folders should match namespacing • MVC (or something) • Development loader / Production builder
NAMES HAVE MEANING
THIS CODE SUCKS
DO THIS INSTEAD • Descriptive names on everything (except iterators)
• Common naming conventions (camelCase vs TitleCase vs nocase) • Exceptions for • constants ( SOME_CONSTANT ) • constructors ( MyClass ) • sub-namespaces ( Foo.bar.Class )_
COMMENTS / DOCUMENTATION
THIS CODE SUCKS
DO THIS INSTEAD • Comment top-level structures • Add notes
whenever logic is not obvious • Build your docs into a searchable tool
SCALING APPLICATIONS FOR ENTERPRISE Part 3
AVOID DUPLICATION
THIS CODE SUCKS
DO THIS INSTEAD • Abstraction! • Use mixins when possible
• Apply stuff to prototypes • Have similar classes/methods? • call() and apply()
DO THIS INSTEAD
SMALLER FILES. WHITE SPACE.
THIS CODE SUCKS
DO THIS INSTEAD • Keep methods under 50 lines •
Keep files under 500 lines • Use as much whitespace as possible.
UNIT TESTS
THIS CODE SUCKS
DO THIS INSTEAD • Write “testable” code • Focus on
important / trouble areas • AUTOMATE UNIT TESTING • Don’t insist on UI (integration/iteraction) tests * Test Driven JavaScript Development by Christian Johansen
TOOLS Stuff You Should Know About
IDE
INSPECT ELEMENT
YSLOW
JS DUCK
PHANTOM.JS
ADVICE Things I’ve Learned
SPECIFICATION – NOT TDD
NEVER STOP LEARNING
BREAK (SOME) RULES
None
ADDITIONAL RESOURCES • “Maintainable JavaScript” by Nicholas Zakas • http://www.slideshare.net/nzakas/maintainable-javascript-2012
• “Code Conventions for JS” by Douglass Crockford • http://javascript.crockford.com/code.html • “JavaScript Performance Tips & Tricks” by Grgur Grisogono • http://moduscreate.com/javascript-performance-tips-tricks/
THANKS! Arthur Kay | @arthurakay
SPEAKERDECK.COM/U/ARTHURAKAY Share this presentation: