HTML5 and mobile: Mobile Academy at Apps World

A high-level look at what the modern web platform offers for application developers

Transcript

1. HTML5 and mobile Bruce Lawson, Opera Software
2. 350 million active users dev.opera.com opera.com/smw
3. Myths and Legends about HTML5
4. Pah! Native already won “I think the biggest mistake that we made, as a company, is betting too much on HTML5 as opposed to native… because it just wasn’t there” Mark Zuckerberg
5. On the other hand… “I’m actually, on long-term, really excited about [html5]. One of the things that’s interesting is we actually have more people on a daily basis using mobile Web Facebook than we have using our iOS or Android apps combined. So mobile Web is a big thing for us.” Mark Zuckerberg
6. Failure of execution or strategy? “zuck should've built his mobile app in html rendered from php, with 40+ blocking script tags. oh wait, they did.” @brianleroux
7. HTML5 makes your site better
8. HTML5 is about mobile
9. HTML5 is not just about mobile “Features should be designed for universal access. ... Features should, when possible, work across different platforms, devices, and media.” dev.w3.org/html5/html-design-principles/
10. Analyst nonsense (with spurious statistics!) “While most new mobile browsers support HTML5, some older browsers still don’t.” “By 2016, more than 2.1 billion mobile devices will have HTML5 browsers, up from just 109 million in 2010.” articles.businessinsider.com/2012-03-29/tech/31253432_1_mobile-experience-mobile-developers- mobile-devices www.totaltele.com/view.aspx?ID=466497
11. HTML5 isn't “ready” .. but that doesn't matter
13. Interoperability
14. Thank you @mamipeko http://d.hatena.ne.jp/Mamipeko/
16. © Copyright 2004-2010 Apple Computer, Inc., Mozilla Foundation, and Opera Software ASA. You are granted a license to use, reproduce and create derivative works of this document. http://www.whatwg.org/specs/web-apps/current-work/
20. HTML5 does not replace HTML 4.01
21. HTML5 has more bling!
22. “...extending the language to better support Web applications, since that is one of the directions the Web is going in and is one of the areas least well served by HTML so far. This puts HTML in direct competition with other technologies intended for applications deployed over the Web, in particular Flash and Silverlight.” Ian Hickson, Editor of HTML5 lists.w3.org/Archives/Public/public-html/2009Jan/0215.html
23. Webforms – more powerful form elements
25. standardise commonly-used rich form elements – without JavaScript
26. built-in validation (of course you should still validate on the server) <input type=email> <input type=url required> <input type=range min=10 max=100> <input type=date min=2010-01-01 max=2010-12-31> <input pattern="[0-9][A-Z]{3}" placeholder="9AAA"> http://people.opera.com/brucel/demo/html5-forms-demo.html
29. Fewer clicks, thanks HTML5!
30. <video>
31. Must encode videos twice (thanks Apple and Microsoft!)
32. storage
33. localStorage/sessionStorage like cookies... document.cookie = 'key=value; expires=Thu, 15 Feb 2010 23:59:59 UTC; path=/' … /* convoluted string operations go here … */
34. localStorage/sessionStorage like cookies...on steroids! localStorage.setItem(key, value); localStorage.getItem(key); localStorage.clear(); localStorage.key = value; if (localStorage.key == '…') { … } …
35. IndexedDB – domain's database in browser //Define a person var person = { name:name, email:email, created:new Date() } //Perform the add var request = store.add(person,1);
36. Appcache
37. Image: @jaffathecake See http://www.alistapart.com/articles/application- cache-is-a-douchebag/
39. navigator.registerServiceWorker("/*","/assets/v1/ctrl.js"). then( function(serviceWorker) { console.log("success!"); // window.location.reload() }, function(why) { console.error("Installing failed!:", why); });
40. is it all safe to use, right now?
42. caniuse.com
43. feature-detection progressive enhancement, graceful degradation http://diveinto.html5doctor.com/everything.html
46. http://modernizr.com/ http://yepnopejs.com/ http://net.tutsplus.com/tutorials/javascript-ajax/easy-script-loading-with-yepnope-js/
47. https://github.com/Modernizr/Modernizr/wiki/HTML5- Cross-Browser-Polyfills
48. NEWT New Exciting Web Technologies
49. Responsive Web Design • CSS Media Queries • Viewport meta - to become CSS Device Adaptation ('Viewport in CSS') • CSS Flexbox
50. WebGL JavaScript-generated 3D graphics without plug-ins.
51. Geolocation JavaScript API to get device's latitude and longditude, with user permission. Device Orientation Events: information about the physical orientation and motion of a hosting device.
52. Web Sockets, Server-Sent Events Web Sockets – a 2-way connection to server that ends wasteful polling and minimises bandwidth-hogging headers. Think chat / multi-player games. Server-Sent Events allow you to push information to the browser without polling. Think latest headlines/ stock prices.
53. getUserMedia
54. WebRTC WebRTC is a free, open project that enables web browsers with Real-Time Communications (RTC) capabilities via simple Javascript APIs. The WebRTC components have been optimized to best serve this purpose. The WebRTC initiative is a project supported by Google, Mozilla and Opera. http://sites.google.com/site/webrtc/ http://www.whatwg.org/specs/web-apps/current-work/complete/video-conferencing- and-peer-to-peer-communication.html
55. More ... • File API • Fullscreen API • Gamepad API • Pointer Lock API • Web Notifications • Calendar • Contacts
56. Native or HTML5? • HTML is the Web, so works anywhere (JavaScript polyfills for old browsers) • HTML is simple to distribute and update – just a URL • Native allows you tighter device integration (for now) • Native is a little faster (does that matter?) • Native apps are easier to control/ monetise
57. Hybrid apps PhoneGap is a trademark of Adobe. Open-sourced at Apache Cordova
58. https://build.phonegap.com/
59. Golden Rules of HTML5 Development • Code to the standard, not browsers • Validate and test in desktop and mobile (use Opera Mobile Emulator and Opera Dragonfly) • Start with a base of valid, accessible HTML and progressively enhance • No browser-sniffing. Use feature detection. • Use all vendor prefixes in your CSS
61. Resources • Articles: http://dev.opera.com/ • Articles: http://html5doctor.com/ • Mobile-friendly: The mobile web optimization guide http://dev.opera.com/articles/view/the-mobile-web-optimization-guide/ • Browser support matrix www.caniuse.com • Modernizr www.modernizr.com • Polyfill collection https://github.com/Modernizr/Modernizr/wiki/HTML5-Cross-browser-Polyfills • HTML5 Spec (Web Developer's View) http://developers.whatwg.org/
62. brucel@opera.com www.brucelawson.co.uk @brucel
63. Thanks Cover (many devices) - http://www.flickr.com/photos/brad_frost/7387827018/in/set- 72157630163121422 Fairy – Lisa Meek larissameek.com/2008/08/11/fairy-dust-a-free-desktop-wallpaper/ Brian May's site guide http://www.brianmay.com/siteguide.html Fingernails - Mamipeko NEWT + Shield - Rob Winters, Mike Brennan, W3C Appcache diagram by Jake Archibald, @jaffathecake, used with permission PhoneGap images are copyright Adobe