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HTML5 on Mobile

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HTML5 on Mobile

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HTML5 on Mobile

  1. 1. HTML5 on Mobile Adam Lu http://adamlu.com/ Frontend Engineer
  2. 2. Previous Slides• HTML5 on Mobile – For Designer http://www.slideshare.net/adamlu/html5-on- mobilefor-designer• HTML5 on Mobile – For Developer http://www.slideshare.net/adamlu/html5-on- mobilefor-developer
  3. 3. Today’s Topic• Why we’re focusing on mobile web• Why we’re using HTML5 on mobile• What is HTML5• What we can use HTML5 to do on mobile(Large Coverage)• What we should care about for mobile web development• Miscellaneous
  4. 4. Why we’re focusing on mobile web
  5. 5. Mobile is Growing• In January 2012, 8.49 percent of website hits/pageviews come from a handheld mobile device (StatCounter)• Mobile will be bigger than desktop internet in 5 years (Morgan Stanley)• 2.1 billion mobile devices will have HTML5 browsers by 2016 up from 109 million in 2010 (ABI Research)
  6. 6. Mobile is Growing Source: Nielsen (January 2012)
  7. 7. Mobile Users prefer browsers over apps (source: Adobe)
  8. 8. Web App vs Native App Web App Native App Comparation Just enter the URL Must be deployed or Installation/updates downloaded Access to web analytics. Apple Store, Android Monetization Rate,SaaS based revenue Market, RatingProgressive Enhancement Follow the standards End User Experience GeoLocation, Offline camera, gyroscope, Access to hardware sensorsStorage, Canvas Graphics, microphone, compass, Audio, Video, accelerometer, GPS Camera(Android3.1+)HTML5, CSS3, Javascript, UI Object-C, Java, C++, J2EE, Developer Experience Library .NET, Cocoa Touch Web Workers, Graphic Run directly on the metal, Performance acceleration, WebGL GPU Acceleration, Multi- Threading
  9. 9. Why we’re using HTML5 on mobile
  10. 10. HTML5 is Great for Mobile• Do not need download to use Web App• One Code base, all popular devices• Tons of great HTML5 features are already supported on modern browsers
  11. 11. What is HTML5
  12. 12. Rough Timeline of Web Technologies• 1991 HTML• 1994 HTML 2• 1996 CSS 1 + JavaScript• 1997 HTML 4• 1998 CSS 2• 2000 XHTML 1• 2002 Tableless Web Design• 2005 AJAX• 2009 HTML 5http://slides.html5rocks.com/#timeline-slide
  13. 13. HTML5Logohttp://www.w3.org/html/logo/
  14. 14. The TechnologyForms, Communication, Canvas, Geolocation, WebApplications, Audio, WebGL, Microdata, Video,Workers, Files, Elements, Storage, LocalDevices, User interaction, Parsing rules, …
  15. 15. What we can useHTML5 to do on mobile
  16. 16. http://mobilehtml5.org/
  17. 17. HTML5 has been widely used on pc web development• http://www.cuttherope.ie/• http://chrome.angrybirds.com/• http://www.20thingsilearned.com/en-US• …… * We will not talk more about HTML5 on PC Web.
  18. 18. HTML5 SEMANTICS
  19. 19. HTML Markup<!DOCTYPE html> Semantic HTML:<html> <section><head> <article><meta charset="utf-8" /> <nav><meta name="viewport" <aside>content="width=device-width, initial- <header>scale=1, maximum-scale=1, user-scalable=no"> <progress><link rel="apple-touch-icon" <time>href="images/favicon.png" /> …</head> Basic Setting:<body> Set Viewport</body> Turn off user-scaling</html> Set favicon …http://www.w3.org/wiki/HTML/Elements
  20. 20. Advanced Forms in Mobile<input type="number" pattern="[0-9]*" /><input type="email” required /><input type="url" /><input type="tel" /><input type="time" /><input type="date" /><input type="month" /><input type="week" /><input type="datetime" /><input type="datetime-local" /><input type="color" />http://jquerymobile.com/demos/1.1.0-rc.1/docs/forms/textinputs/
  21. 21. Microdata, ARIA attributes<div <ul id="tree1"itemscopeitemtype="http://example. role="tree"org/band"> tabindex="0"<p>My name is <span aria-labelledby="label_1">itemprop="name">Neil</span>.</p> <li role="treeitem" tabindex="-1" aria-<p>My band is called <span expanded="true">Fruits</li>itemprop="band">Four Parts <li role="group">Water</span>.</p> <ul><p>I am <span <lirole="treeitem" tabindex="-itemprop="nationality">British</span 1">Oranges</li>>.</p> <li role="treeitem" tabindex="-</div> 1">Pineapples</li>http://dev.w3.org/html5/md/ ... </ul> </li>http://www.w3.org/WAI/intro/aria </ul>
  22. 22. OFFLINE&STORAGE
  23. 23. Offline Web Application Cache• Method of defining web page files to be cached using a cache manifest file, allowing them to work offline on subsequent visits to the page<html window.applicationCache.addEventListenmanifest="/cache.manifest”> er(updateready, function(e) {CACHE MANIFEST if (window.applicationCache.status ==# version 1.0.0 window.applicationCache.UPDATEREADY{NETWORK:* window.applicationCache.swapCach();CACHE: window.location.reload();/js/*/image/* }}, false);FALLBACK: http://www.w3.org/TR/html5/offline.html
  24. 24. Local Storage, Session Storage• Web storage and DOM storage (document object model) are web application software methods and protocols used for storing data in a web browser. varfoo = localStorage.getItem(“bar”); localStorage.setItem(“bar”, “foo”); localStorage.clear(); sessionStorage.setItem(‘a’, ‘1’); sessionStorage.removeItem(‘a’); window.addEventListener(“storage”, ha ndle_storage, false); http://dev.w3.org/html5/webstorage/
  25. 25. DEVICE ACCESS
  26. 26. Geolocation• Method of informing a website of the users geographical location navigator.geolocation.getCurrentPosition(succe ss, failure, options); PERMISSION_DE NIED (1) POSITION_UNAV AILABLE (2) TIMEOUT (3) UNKNOWN_ERR OR (0)
  27. 27. Javascript Eventswindow.addEventListener("touchstart", function(e){//e.touches;}, false);window.addEventListener("orientationchange", function(e){//window.orientation(0 is portrait, 90 and -90 are landscape)}, false);window.addEventListener("deviceorientation", function(e){//e.alpha//e.beta//e.gamma}, false);window.addEventListener("devicemotion", function(e){//e.acceleration.x/y/z//e.accelerationIncludingGravity.x/y/z}, false);http://www.html5rocks.com/en/tutorials/device/orientation/
  28. 28. Device Supportwindow.devicePixelRatio HTML Media Capture: <input type="file" accept="image/*"navigator.connection(Android2.2+) capture="camera" />//navigator.connection object <device type="media"></device>{ "type": "3", <video autoplay></video> "UNKNOWN": "0", navigator.getUserMedia({video: "ETHERNET": "1", true, audio: true}, function(stream) { "WIFI": "2", var video = "CELL_2G": "3", document.querySelector(video); "CELL_3G": "4" video.src = stream;} }, errorCallback);http://dev.w3.org/2011/webrtc/editor/getusermedia.html
  29. 29. CONNECTIVITY
  30. 30. Web Sockets• W3C/IETF Standard• Real-time, low latency, true full-duplex communication channel• Build on top of HTTP, sharing ports with existing HTTP content, use ws: and wss: schemes• Only small overhead for text messages, reducing bandwidth conn = new WebSocket(ws://node.remysharp.com:8001); conn.onopen= function (envent) {conn.send(‘hello’);}; conn.onmessage= function (event) {}; conn.onclose= function (event) {}; http://html5demos.com/web-socket
  31. 31. Server-Sent Events• Open an HTTP connection for receiving push notifications from a server in the form of DOM events.• Standardize sending a continuous stream of data from server to browser• The API is designed such that it can be extended to work with other push notification schemes such as Push SMS. Client: Server: var source = new EventSource("url"); res.writeHead(200, {"Content‐Type": source.onmessage = function(event) { "text/event‐stream"}); alert(event.data); res.write(“data: ” + JSON.stringify(stuff) } +”n”);res.flush(); http://dev.w3.org/html5/eventsource/
  32. 32. XMLHttpRequest Level 2 • XMLHttpRequest(XHR) Level2 significantly enhances XMLHttpRequestFetch Data: Send Data:varxhr = new XMLHttpRequest(); function uploadFiles(url, files) {xhr.open(GET, /path/to/image.png, true); varformData = new FormData();xhr.responseType = blob; for (vari = 0, file; file = files[i]; ++i) {xhr.onload = function(e) { formData.append(file.name, file);} if (this.status == 200) { varxhr = new XMLHttpRequest();var blob = this.response; xhr.open(POST, url, true);varimg = document.createElement(img); xhr.send(formData); }img.src = document.querySelector(input[type="file"window.URL.createObjectURL(blob); ]).addEventListener(change, function(e) {document.body.appendChild(img); uploadFiles(/server, this.files); } }, false);};xhr.send(); http://www.w3.org/TR/XMLHttpRequest/
  33. 33. Cross-document messaging• Enables secure cross-origin communication across iframes, tabs and windows• Uses Origin security window.addEventListner("message", message Handler, true); function messageHandler(e){ if(e.origin== http://www.yahoo.com){ processMessage(e.data); } //ignore message if origin not recognized } http://dev.w3.org/html5/postmsg/
  34. 34. Cross-Origin Resource Sharing• Defines a mechanism to enable client-side cross- origin requests. Specifications that enable an API to make cross-origin requests to resources can use the algorithms defined by this specification. If such an API is used on http://example.org resources, a resource on http://hello- world.examplecan opt in using the mechanism described by this specification (e.g., specifying Access-Control-Allow-Origin: http://example.org as response header), which would allow that resource to be fetched cross-origin from http://example.org. http://www.w3.org/TR/cors/
  35. 35. MULTIMEDIA
  36. 36. Video <video id=“video” poster=”poster.jpg" src=”source.mp4" width="2" height="1" x-webkit- airplay="allow” autoplay controls></video> AddType video/ogg .ogv AddType video/mp4 .mp4 AddType video/webm .webm document.getElementById(‘video’) .play();http://m.youtube.com/
  37. 37. Audio <audio id=“audio” controls preload="auto" autobuffer> <source src="elvis.mp3" /> <source src="elvis.ogg" /> </audio> var audio = document.getElementById(‘audio’); audio.play(); audio.pause(); audio.volume+=0.1; audio.currentTime = 122; More: WEB AUDIO API http://html5.grooveshark.com/
  38. 38. 3D, GRAPHICS, EFFECTS
  39. 39. Canvas• 2D drawing platform within the browser• Use nothing more than JavaScript and HTML – no plugins• Extensible through a JavaScript API <canvas id="a" width="300" height="225"></canvas> vara_canvas = document.getElementById("a"); vara_context = a_canvas.getContext("2d"); a_context.lineWidth = 5; a_context.strokeStyle = ‘rgba(244, 34, 23, .8)’; a_context.fillRect(50, 25, 150, 100); a_context.stroke(); http://jacebook.co.uk/share/html5/
  40. 40. WebGL• Javascript Binding for OpenGL ES 2.0 on Browser• Run as a specific context for the HTML <canvas> element, which gives you access to hardware-accelerated 3D rendering in JavaScript.• Allow developers to put real-time interactive 3D graphics in the browser. http://mrdoob.github.com/three.js/ a lightweight 3D engine
  41. 41. SVG• Method of displaying basic Vector Graphics features using the embed or object elements* SVG isn’t part of HTML5
  42. 42. PERFORMANCE&INTEGRATION
  43. 43. Web Workers• Scripts running in background• Heavy Weight Scripts var worker = new Worker(doWork.js); doWorker.js worker.addEventListener(message, functi on(e) { self.addEventListner(‘message’, functio console.log(Worker said: , e.data); n(e){ }, false); self.postMessage(e.data+’ Worker worker.postMessage(Hello World); // says: Hello’); Send data to our worker worker.onerror= function(e){} }, worker.terminate(); false); http://dev.w3.org/html5/workers/
  44. 44. History API• The DOM window object provides access to the browsers history through the history object. It exposes useful methods and properties that let you move back and forth through the users history window.history.pushState(data, title, url);//Add one history state into browser history and update the URL in the browser window. window.history.replaceState(state, title, url);//Modify the current history entry instead of creating a new one. window.onpopstate = function(e){e.state;};//A popstate event is dispatched to the window every time the active history entry changes. http://html5demos.com/history
  45. 45. CSS3 STYLING
  46. 46. CSS3 New Features• Border Radius• Shadows• Gradient• Color• Background• Border Image• Font• Transform• Transition• Animation DEMO: http://jsfiddle.net/adamlu/xGuKy/
  47. 47. CSS on Mobile-webkit-text-size-adjust: none;-webkit-user-select: none;-webkit-touch-callout;-webkit-tap-highlight-color: transparent;position: fixed;audio, canvas, video { display: inline-block;}article, aside, details, figcaption, figure, footer, header, hgroup, nav, section {display: block; }input[type="search"]{ -webkit-appearance: none/textfield;}
  48. 48. What we should careabout for mobile web development
  49. 49. Mobile-First Responsive Design• Responsive Web design is the approach that suggests that design and development should respond to the user’s behavior and environment based on screen size, platform and orientation. http://www.alistapart.com/articles/responsive-web-design/
  50. 50. Choose a Framework• Boilerplate http://html5boilerplate.com/mobile• Packaging frameworks  http://phonegap.com/  http://www.appmobi.com/• Web application frameworks  http://jquerymobile.com/  http://yuilibrary.com/  http://sproutcore.com/  http://www.sencha.com/  http://zeptojs.com/• HTML5 Game frameworks  http://www.limejs.com/  http://craftyjs.com/  http://impactjs.com/
  51. 51. Mobile Debugging Tools• Debugging  WEINRE  WebKit Remote Debugging• Emulators & Simulators  Mobile Emulators and Simulators  Android Emulator  iOS Simulator• Performance  Mobile PerfBookmarklet  http://www.blaze.io/mobile/
  52. 52. Miscellaneous
  53. 53. Make Mobile Web Applications http://app.ft.com
  54. 54. Make Mobile Web Application Full screen mode: <meta name="apple-mobile-web-app-capable" content="yes" /> Native Look: text-shadow box-shadow multi backgrounds border-image border-radius rgba color gradient transform transition Mobile Behavior: position: fixed; overflow: scroll; touch/gesture/orientationchange event Offline: AppCache LocalStoragehttp://adamlu.com/iEye/
  55. 55. http://pinchzoom.com/uploads/anatomy-of-a-html5-mobile-app.png
  56. 56. Usage of HTML5 in Mobile Web
  57. 57. Usage of HTML5 in Mobile Web
  58. 58. Usage of HTML5 in Mobile Web
  59. 59. Usage of HTML5 in Mobile Web
  60. 60. Mobile Design Patternshttp://mobile-patterns.com/
  61. 61. Compatibility• http://haz.io/• http://caniuse.com/• http://css3test.com/• http://css3generator.com/• http://css3info.com/• http://html5test.com/• http://css3please.com/• http://mobilehtml5.org/• http://quirksmode.org/m/
  62. 62. Inspiration• http://mobile-patterns.com/ - Mobile UI Patterns• http://pttrns.com- Another gallery of Mobile UI• http://mobileawesomeness.com- the best in mobile web design and developer news.
  63. 63. Resources• http://diveintohtml5.info/• http://www.html5rocks.com/• http://html5demos.com/• http://www.mobilehtml5.com/• http://www.w3.org/TR/html5/• http://gs.statcounter.com/
  64. 64. HTML5 is the future of Mobile!
  65. 65. @adamlu

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