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Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
Things I've learnt from my Hacker News web app
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Things I've learnt from my Hacker News web app

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A talk I gave at the Front-end Developers User Group meet up in Hackerspace SG.

A talk I gave at the Front-end Developers User Group meet up in Hackerspace SG.

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  • 1. Things Ive learnt from myHacker News web app
  • 2. Hello, Im 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.
  • 3. What isHacker News?
  • 4. news.ycombinator.com
  • 5. I builtHackerWeb.
  • 6. 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
  • 7. Cutting-edge web tech-webkit-overflow-scrolling: touch, localStorage,sessionStorage, CORS, Application Cache, CSSAnimation, CSS Media Queries, Flexible Box Layout(old spec), requestAnimationFrame, Web Workers,and more…
  • 8. Must-reads• How I built the Hacker News mobile web app• How I built the Hacker News mobile web app, Part 2• Introducing HackerWeb
  • 9. Focus on 3 things1. -webkit-overflow-scrolling: touch (Momentum scrolling)2. CORS (Cross-Origin Resource Sharing)3. Application Cache
  • 10. 1Momentum scrolling
  • 11. -webkit-overflow-scrolling: touch• iOS-specific, for now. No official spec.• Introduced since iOS5 (October 2011).• For overflow:scroll elements.
  • 12. Before iOS5• Two fingers to scroll overflow:scroll elements.• Unintuitive and undiscoverable.• Scrolling libs to the rescue: iScroll, Scrollability, TouchScroll, FTScroller, etc
  • 13. 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: Cant scroll to top when tapping status bar
  • 14. Demo time• Normal scrolling: jsbin.com/uhiyac/1• Momentum scrolling: jsbin.com/uhiyac/2
  • 15. Resources• Overthrow – overflow:auto polyfill• jQuery Mobile: touchOverflow• Nested divs with overflow:touch
  • 16. 2CORS
  • 17. 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”.
  • 18. CORS• A W3C Working Draft.• Allow JavaScript to make cross-domain requests.• An interplay between the server and the client. Access-Control-Allow-Origin: *
  • 19. Use CORS today!
  • 20. Who implements CORS?• Google APIs• Amazon S3• YouTube API• Dropbox API• GitHub v3 API• …and more
  • 21. Resources• Enable CORS• CORS isn’t just for XHR• Can I use CORS?• Using CORS - HTML5 Rocks• CORS Proxy
  • 22. 3Application Cache
  • 23. AppCache• Easily make your web site/app offline.• A working draft.• A douchebag.
  • 24. Super simple stepsStep 1. <html manifest="manifest.appcache">Step 2. CACHE MANIFEST index.html stylesheet.css …
  • 25. VersioningCACHE MANIFEST# 2013-01-21:v1index.htmlstylesheet.css…
  • 26. Google Reader
  • 27. Reeddit – Reddit web app client
  • 28. Track AppCache versionsUse Google Analytics event tracking
  • 29. Make local dev easier• Serve 404 for .appcache files• For HackerWeb, I use node server.js -noappcache
  • 30. Resources• A Beginners Guide to Using the Application Cache• Fixing Application Cache Community Group• Appcache Facts
  • 31. 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…
  • 32. Thanks• cheeaun.com• twitter.com/cheeaun• github.com/cheeaun Images used in this presentation• flickr.com/photos/diathesis/2262012694/

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