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
Things I've learnt from my Hacker News web app
Search
Lim Chee Aun
January 22, 2013
Technology
1
120
Things I've learnt from my Hacker News web app
A talk I gave at the Front-end Developers User Group meet up in Hackerspace SG.
Lim Chee Aun
January 22, 2013
Tweet
Share
More Decks by Lim Chee Aun
See All by Lim Chee Aun
Hacktoberfest SG 2018
cheeaun
0
130
CSS-ing the Super Silly Hackathon website
cheeaun
0
97
Bridging Connections
cheeaun
2
450
Other Decks in Technology
See All in Technology
Кто отправит outbox? Валентин Удальцов, автор канала Пых
lamodatech
0
300
(非公式) AWS Summit Japan と 海浜幕張 の歩き方 2025年版
coosuke
PRO
1
340
Azure AI Foundryでマルチエージェントワークフロー
seosoft
0
150
OpenHands🤲にContributeしてみた
kotauchisunsun
0
250
白金鉱業Meetup_Vol.19_PoCはデモで語れ!顧客の本音とインサイトを引き出すソリューション構築
brainpadpr
2
490
[TechNight #90-1] 本当に使える?ZDMの新機能を実践検証してみた
oracle4engineer
PRO
3
140
Microsoft Build 2025 技術/製品動向 for Microsoft Startup Tech Community
torumakabe
2
210
強化されたAmazon Location Serviceによる新機能と開発者体験
dayjournal
2
160
ローカルLLMでファインチューニング
knishioka
0
130
キャディでのApache Iceberg, Trino採用事例 -Apache Iceberg and Trino Usecase in CADDi--
caddi_eng
0
170
Welcome to the LLM Club
koic
0
140
Clineを含めたAIエージェントを 大規模組織に導入し、投資対効果を考える / Introducing AI agents into your organization
i35_267
4
1.4k
Featured
See All Featured
The Art of Programming - Codeland 2020
erikaheidi
54
13k
Distributed Sagas: A Protocol for Coordinating Microservices
caitiem20
331
22k
The Success of Rails: Ensuring Growth for the Next 100 Years
eileencodes
45
7.4k
The Cult of Friendly URLs
andyhume
79
6.4k
The Illustrated Children's Guide to Kubernetes
chrisshort
48
50k
VelocityConf: Rendering Performance Case Studies
addyosmani
330
24k
Building a Modern Day E-commerce SEO Strategy
aleyda
41
7.3k
Statistics for Hackers
jakevdp
799
220k
Responsive Adventures: Dirty Tricks From The Dark Corners of Front-End
smashingmag
252
21k
Automating Front-end Workflow
addyosmani
1370
200k
Imperfection Machines: The Place of Print at Facebook
scottboms
267
13k
Sharpening the Axe: The Primacy of Toolmaking
bcantrill
44
2.4k
Transcript
Things I've learnt from my Things I've learnt from my
Hacker News web app Hacker News web app
Hello, I'm Chee Aun. • Hardcore web developer. • Created
quite a bunch of fun little side projects. • Tweet a lot of interesting stuff at @cheeaun • Occasionally read Hacker News.
What is Hacker News?
news.ycombinator.com news.ycombinator.com
I built HackerWeb.
HackerWeb • A simple read-only web app client for Hacker
News. • Mobile-optimized, iOS-optimized. • Works on all modern browsers, hopefully. • Check it out at hackerwebapp.com
None
None
None
Cutting-edge web tech -webkit-overflow-scrolling: touch, localStorage, sessionStorage, CORS, Application Cache,
CSS Animation, CSS Media Queries, Flexible Box Layout (old spec), requestAnimationFrame, Web Workers, and more…
Must-reads • How I built the Hacker News mobile web
app • How I built the Hacker News mobile web app, Part 2 • Introducing HackerWeb
Focus on 3 things 1. -webkit-overflow-scrolling: touch (Momentum scrolling) 2.
CORS (Cross-Origin Resource Sharing) 3. Application Cache
1 Momentum scrolling
-webkit-overflow-scrolling: touch • iOS-specific, for now. No official spec. •
Introduced since iOS5 (October 2011). • For overflow:scroll elements.
Before iOS5 • Two fingers to scroll overflow:scroll elements. •
Unintuitive and undiscoverable. • Scrolling libs to the rescue: iScroll, Scrollability, TouchScroll, FTScroller, etc
Starting from iOS5 • One finger to scroll overflow:scroll elements.
• -webkit-overflow-scrolling: touch adds momentum to it. • Scrolling libs are still in used due to bugs/quirks. • Bug: Can't scroll to top when tapping status bar
Demo time • Normal scrolling: jsbin.com/uhiyac/1 • Momentum scrolling: jsbin.com/uhiyac/2
Resources • Overthrow – overflow:auto polyfill • jQuery Mobile: touchOverflow
• Nested divs with overflow:touch
2 CORS
Before CORS • Use JSONP. • Request data from a
server in a different domain. • Example: json-head.appspot.com/? url=http://www.google.com/&callback=test • A “hack”.
CORS • A W3C Working Draft. • Allow JavaScript to
make cross-domain requests. • An interplay between the server and the client. Access-Control-Allow-Origin: *
Use CORS today!
Who implements CORS? • Google APIs • Amazon S3 •
YouTube API • Dropbox API • GitHub v3 API • …and more
Resources • Enable CORS • CORS isn’t just for XHR
• Can I use CORS? • Using CORS - HTML5 Rocks • CORS Proxy
3 Application Cache
AppCache • Easily make your web site/app offline. • A
working draft. • A douchebag.
Super simple steps Step 1. <html manifest="manifest.appcache"> Step 2. CACHE
MANIFEST index.html stylesheet.css …
Versioning CACHE MANIFEST # 2013-01-21:v1 index.html stylesheet.css …
Google Reader
Reeddit – Reddit web app client
Track AppCache versions Use Google Analytics' event tracking
Make local dev easier • Serve 404 for .appcache files
• For HackerWeb, I use node server.js -noappcache
Resources • A Beginner's Guide to Using the Application Cache
• Fixing Application Cache Community Group • Appcache Facts
More resources • Moobile – new mobile application framework built
on MooTools • Ratchet – Prototype iPhone apps with simple HTML, CSS and JS components • HTML5 Rocks • Can I use…
Thanks • cheeaun.com • twitter.com/cheeaun • github.com/cheeaun Images used in
this presentation • flickr.com/photos/diathesis/2262012694/