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HTML5 for Tablets and Mobile
The document discusses mobile internet usage in Nigeria, highlighting that 31% of internet access is via mobile devices. It covers aspects of mobile app development, including considerations for different pixel densities, the use of CSS media queries for responsive designs, and various viewport configurations for mobile browsers. Additionally, it emphasizes the importance of touch interactions in mobile design and suggests optimizing resources for unpredictable mobile internet bandwidth.
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HTML5 for Tablets and Mobile
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- 3. 31% of allInternet use in Nigeria is mobile
- 4. The Internet isMobile
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- 8. HTML5 standard maximizesreusability
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- 10. What is a“native” app?
- 12. When is apixel not a pixel?
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- 15. “If the pixeldensity 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. ViewPortConfigurable<meta name="viewport" content="width=device-width,initial-scale=1.0">Optional: user-scalable=no target-densitydpi=device-dpi (Android Only)
- 17. media queriesTarget stylesto 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 formobile browsers<meta name="viewport" content="width=device-width, initial-scale=1.0">Optional: user-scalable=notarget-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,Nota Click. Right?
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- 23. Mobile Internet isunpredictable.
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Editor's Notes
- #2 HTML5 for Tablets & Mobile DevicesThis 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.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.
- #4 http://www.quirksmode.org/blog/archives/2011/06/mobile_browser_9.html20% in India, 11% in Indonesia. Compares to 6% in US and UK.Unfortunately, development countries largely on Opera Mini and Nokia
- #6 Q1 2011 PC sales slide for first time (down 3%): http://www.businessinsider.com/trouble-for-microsoft-pc-market-tanks-in-q1-2011-4Smart Phone Q1 2011 shipments: http://www.pdasnews.com/articles/idc-smartphone-shipment-figures-for-q1-2011.htmlThis is a trend now. First time SmartPhones out shipped PCs was Q42010. Stories from that time:http://www.chrisumiastowski.com/smartphone-market-bigger-than-pc-market-what-does-it-meanhttp://www.readwriteweb.com/archives/smartphones_outsell_pcs.php
- #8 Q1 2011 Worldwide DataiOS = 16.8%Android = 36%Symbian = 27.4%RIM = 12.9%MSFT = 3.6%Other = 3.3%Browser share stats (Q1 2011): http://www.quirksmode.org/blog/archives/2011/06/mobile_browser_9.html
- #11 Looks right.Feels right.Available anytime.“Installable.”In an app store?
- #13 When is a pixel not a pixel?Visual vs. Layout ViewPort
- #14 http://www.quirksmode.org/mobile/viewports2.htmlhttp://www.quirksmode.org/blog/archives/2010/04/a_pixel_is_not.htmlhttps://developer.mozilla.org/en/Mobile/Viewport_meta_tag
- #15 https://developer.mozilla.org/en/Mobile/Viewport_meta_tag#A_pixel_is_not_a_pixel
- #16 Density of pixel displays:http://en.wikipedia.org/wiki/List_of_displays_by_pixel_density
- #18 http://www.webdesignerwall.com/tutorials/css3-media-queries/http://www.w3.org/TR/css3-mediaqueries/Code for targeting iPhone: http://perishablepress.com/press/2010/10/20/target-iphone-and-ipad-with-css3-media-queries/
- #19 http://matt.might.net/articles/how-to-native-iphone-ipad-apps-in-javascript/http://html5boilerplate.com/docs/#the-markuphttp://developer.apple.com/library/safari/#documentation/AppleApplications/Reference/SafariHTMLRef/Articles/MetaTags.html#//apple_ref/doc/uid/TP40008193Discussion of viewport and older mobile meta tags: http://davidbcalhoun.com/tag/handheldfriendly
- #22 Article on iPhone touch considerations: http://oreilly.com/iphone/excerpts/iphone-programming-user/touch-patterns.html
- #23 http://www.the-m-project.org/http://www.appcelerator.com/products/titanium-mobile-application-development/http://jquerymobile.com/http://jqtouch.com/http://www.sencha.com/products/touch/Good comparison:http://stackoverflow.com/questions/5063117/choosing-mobile-web-html5-framework
- #24 http://www.digitaltrends.com/mobile/smartphone-buyers-dont-care-about-4g-yet-study-shows/http://www.informationweek.com/news/mobility/3G/231000200Current generation of smartphone buyers not interest in paying premium for 4G or faster phones.
- #28 Motorola device images: http://mediacenter.motorola.com/imagelibrary/default.aspx?SubjectID=195LG images: http://www.lgnewsroom.com/ces2011/list.php?product_type=1HP Palm:http://www.hpwebos.com/us/company/media-library/media-library.html?checkbox-accept=acceptRIM/Blackberry:http://www.rim.com/newsroom/mediagallery/Apple: http://www.apple.com/pr/products/