The explosion of HTML5-ready tablets and mobile devices has been one of the primary forces behind HTML5’s rapid coming of age. Virtually all modern devices with a web browser have broad support for the technologies defined by HTML5, like Video, Geolocation, Offline Apps, Local Storage, and CSS3 styling, making them the perfect target for aggressive HTML5 development. Targeting the look-and-feel, touch-based input, and varying screen sizes of devices can be tricky, though. This session will introduce you to the essential concepts for targeting HTML5 devices, such as Media Queries and Viewport sizing, and provide you with the tips and tricks you need to successfully develop modern web apps for tablets and mobile devices today.

2. @toddanglin

3. 31% of all Internet use in Nigeria is mobile

4. The Internet is Mobile

5. 100m 81m

6. Which devices matter?

7. iOS Android Symbian RIM MSFT … KR WEBKIT 98% USA 69% UK 58% CN 32%

8. HTML5 standard maximizes reusability

9. considerations Native-ness Screen Size Interaction Look-and-feel Bandwidth

10. What is a “native” app?

12. When is a pixel not a pixel?

13. 320px 980px

14. CSS pixelsvs.Physical Pixels

15. “If the pixel density of the output device is very different from that of a typical computer display, the user agent should rescale pixel values.” - CSS 2.1

16. ViewPort Configurable <meta name="viewport" content="width=device-width, initial-scale=1.0"> Optional: user-scalable=no target-densitydpi=device-dpi (Android Only)

17. media queries Target styles to specific devices… And features! /*These two rules do the same thing*/ @media all and (min-width:500px) { … } @media (min-width:500px) { … } /*Multiple conditions*/ @media only screen and (min-width: 600px) and (max-width: 900px) { .class { background: #333; } }

18. <meta> Rendering hints for mobile browsers <meta name="viewport" content="width=device-width, initial-scale=1.0"> Optional: user-scalable=no target-densitydpi=device-dpi (Android Only) <!--iOS specific--> <meta name="apple-mobile-web-app-capable" content="yes"> <meta name="apple-mobile-web-app-status-bar-style" content="black" /> <link rel="apple-touch-icon" href="./apple-touch-icon.png" />

19. It’s a Touch,Not a Click. Right?

20. Touch Events touchstart touchmove touchend touchcancel gesturestart* gesturechange* gestureend*

21. touch Accuracy Size Shape Placement Overlapping

22. frameworks

23. Mobile Internet is unpredictable.

24. bandwidth Optimize design Clicks/Screens Graphics Selectively load resources

25. Future “Windows 8” Chrome OS Facebook

26. @htmlui

27. Resources