HTML5 Overview

Microsoft Community Mgr. Editor of Script Junkie Ajaxian.com writer Director of Community for jQuery JS Library Project Team JavaScript & HTML5 fan boy Rey Bango

http://scriptjunkie.com

Newest version of HTML Provides backwards compatibility Your HTML/XHTML continue to work Supported by all modern browsers IE9 Beta Firefox Chrome Opera Safari HTML5

Specification of HTML published by W3C W3C HTML5 Spec => 900+ pages Work started on HTML5 in late 2003 First Working Draft published January 2008 WHATWG Last Call on October 28, 2009 Expected Candidate Recommendation - 2012 W3C Recommendation - 2022 or later * http:// dev.w3.org/html5/spec / HTML5

HTML5 has become an umbrella term for everything including CSS3. It’s not! It’s an upgrade to the HTML specification It provides backward compatibility Enhances some tags and brings new semantic tags Programmatic components like Canvas & Drag-and-Drop HTML5’s Umbrella Effect

What can be considered part of HTML5 then? Canvas – API for 2D drawing Audio & Video – In-browser audio & video; no plugins New semantic elements such as article, footer, header, nav & section Sub-projects: Web Storage Geolocation Drag and Drop How to tell what you can use? http://www.caniuse.com/ So What’s in It?

What is NOT in HTML5 then? CSS Transforms – rotation, scaling, skewing of elements CSS Transitions – transitions between CSS property changes Border Radius – rounded corners Box Shadow- shadow selected elements @font-face – web fonts This is CSS3!! What’s Not?

… or cats, babies and staplers.

What are Developers Raving About?

The Cool Stuff: New semantic elements such as article, footer, header, nav & section Canvas – API for 2D drawing Video – In-browser video; no plugins Web Storage – offline storage Forms – form enhancements Geolocation HTML5 is Cool

doctype <!DOCTYPE HTML PUBLIC "-//W3C//Dtd HTML 4.01 Transitional//EN" "http://www.w3.org/tr/html4/loose.dtd"> HTML 4.01: HTML5 <!doctype html>

<div id=”nav”> <div id=”sidebar”> <div id=”article”> <div id=”footer”> <div id=”header”> HTML Tags

<nav> <aside> <section> <article> <footer> <header> Semantic HTML Tags

<nav> <aside> <nav> <section> <article> <footer> <header> Semantic HTML Tags

<address> Written by:<br/> <a href="/people/show/23">Timothy Fisher</a>, <br/> Address: 25296 Hunter Lane, Flat Rock, MI 48134 <br/> Phone: 555-1212 </address> Address applies to the nearest Article or Body tag. More Semantic HTML Tags Address Prior to HTML5 the Address element applied to the document/body as a whole

<div class="car" data-brand =" ford " data-model =" mustang "> <button class="fire"> </div> More Semantic HTML Tags Data Attributes //Using DOM's getAttribute() property var brand=mydiv.getAttribute("data-brand") //returns "ford" mydiv.setAttribute("data-brand", "mazda") //changes "data-brand" to "mazda" mydiv.removeAttribute("data-brand") //removes "data-brand" attribute entirely //Using JavaScript's dataset property var brand=mydiv.dataset.brand //returns "ford" mydiv.dataset.brand='mazda' //changes "data-brand" to "mazda" mydiv.dataset.brand=null //removes "data-brand" attribute Custom data attribs were always possible but prior to HTML5 they would cause validation errors.

<section> <hgroup> <h1>Mobile Phones</h1> <h2>Different Smart Phones</h2> </hgroup> <p>Some of the more popular mobile smart phones</p> <article> <h1>Apple iPhone</h1> <p>A popular smart phone from Apple.</p> </article> <article> <h1>Android-based Phones</h1> <p>A series of smart phones that use the Google Android operating system.</p> </article> </section> More Semantic HTML Tags Section, hgroup, Article These elements replace many of your divs

<figure> <img src="ninja_guy.jpg" alt="A Standing Ninja Guy."> <figcaption>Cool Ninja Guy</figcaption> </figure> More Semantic HTML Tags Figure and Figure Caption The browser can position the caption for you Cool Ninja Guy

More Semantic HTML Tags Menu and Command <menu label="Hero List"> <command type="radio" radiogroup="herolist" label="Spiderman"> <command type="radio" radiogroup="herolist" label="Superman"> <command type="radio" radiogroup="herolist" label="Batman"> </menu> a simple radio button group

<menu type="toolbar"> <li> <menu label="File"> <button type="button" onclick="file_new()">New...</button> <button type="button" onclick="file_open()">Open...</button> <button type="button" onclick="file_save()">Save...</button> <button type="button"onclick="file_saveas()">Save As...</button> </menu> </li> <li> <menu label="Edit"> <button type="button" onclick="edit_copy()">Copy...</button> <button type="button" onclick="edit_cut()">Cut...</button> <button type="button" onclick="edit_paste()">Paste...</button> </menu> </li> </menu> More Semantic HTML Tags Menu (continued)

<video src =”ironman.mp4” /> Automatically show native controls <video src =”ironman.mp4” controls /> Video

Codec Support Credit: Encoding.com

<video controls/> <source src=”ironman.mp4” /> <source src=”ironman. webm ” /> </video> Video ironman.mp4 ironman.webm

<audio src=” teenage_dream.mp3”></audio> <audio controls> <source src=”teenage_dream.mp3”/> <source src=”teenage_dream.ogg”/> </audio> Audio Provides a download link for non-supporting browsers: <audio src=”teenage_dream.ogg” autoplay controls loop> <a href=” teenage_dream.ogg”>download</a> </audio>

<canvas id=”square”> fallback content </canvas> <script> // create basic filled square canvas = canvas.getElementById(‘square’); context = canvas.getContext(‘2d’); context. fillStyle = “#000000”; context. fillRect (0, 0, 100, 100); </script> Canvas A complete drawing and animation API

Cross-Domain Messaging // sender var o = document.getElementsByTagName('iframe')[0]; o.contentWindow.postMessage('Hello world', ' http://b.example.org/' ); // recipient addEvent(window, "message", function(e){ document.getElementById("rcvd_message").innerHTML = e.origin + " said: " + e.data; });

sessionStorage.setItem(key, value); sessionStorage.getItem(key); localStorage.setItem(key, value); localStorage.getItem(key); Session Storage Save key/value pairs to a client-side data store implemented by browser Session store expires when the browser is closed

Output < progress id="p" max=100><span>0</span>%</ progress > Progress < output name="result"></ output > Progress

Storage space usage: <meter value=6 max=8> 6 blocks used (out of 8 total) </meter> Voter turnout: <meter value=0.75> <img alt="75%" src="graph75.png"> </meter> Tickets sold: <meter min="0" max="100" value="75"></meter> Meter Meter

<div draggable=”true”></div> // set data to access at target addEvent(div, “dragstart”, function(e) { e.dataTransfer.setData(‘foo’, ‘bar’); }, true); // access data from dragged object addEvent(div, ‘dragend’, function(e) { e.dataTransfer.getData(‘foo’); }, true); Drag and Drop HTML5 drag and drop should work across frames, and across browser windows . HTML5 drag and drop also allows users to drag and drop data to and from non-web applications , i.e. out of the browser or into the browser

<input type=”email” /> Input Types tel search email url datetime date range color Unsupported browsers default to text type Future browsers will display appropriate UI controls

<input type="range" min="-100" max="100" value="0" step="10" name="power" list="powers"> <datalist id="powers"> <option value="0"> <option value="-30"> <option value="30"> <option value="+50"> </datalist> Input Types Input Type Range + Datalist

<input type=file multiple> Input Types File Upload Multiple

Input Types Datalist Used to provide Auto Complete feature <input list="movies" /> <datalist id="movies"> <option>The Dark Knight</option> <option>Spiderman 3</option> <option>X-Men</option> </datalist>

<input name="custname" required> <script> form.checkValidity(); </script> Form Validation By adding ‘required’ attribute you can take advantage of validity checking without custom JavaScript.

<html manifest=”cache.manifest”> Offline Applications Offline Applications using manifest Run a web application in offline mode, disconnected from Internet provide a cache.manifest file: Of course your app will still have failures if it tries to pull live data from the Internet uses MIME type: text/cache-manifest CACHE MANIFEST clock.html clock.css clock.js

window.history.back(); window.history.forward(); window.history.go(2); window.history.length; window.history.pushState(data, title, url); window.history.replaceState(data, title, url); JavaScript API for moving through browser history History API

navigator. geolocation . getCurrentPosition( function(position) { // display position } ); Geolocation Build location-aware apps without access to native mobile apis

Local Storage A set of APIs to manipulate client-side databases using SQL Web SQL Apple Google Opera IndexedDB has replaced Web SQL

Web Sockets Opens a persistent connection to the server Can be used for server to browser push Restricted communication to origin server Eliminates need to poll for data var ws = new WebSocket("ws://friendfeed.com/websocket"); ws.onopen = function() { ws.send("This is a message from the browser to the server"); }; ws.onmessage = function(event) { alert("The server sent a message: " + event.data); };

- Provide “threads” for JavaScript execution - Don’t have access to DOM or page. - Have to communicate through postMessage API Web Workers

W3C says we shouldn’t use HTML5!!!!

Create a solid cross-browser base to start from & use HTML5 to enhance sites Fallbacks can be used to degrade gracefully when necessary <video controls width="500"> <source src="video.ogg" /> <source src="video.mp4" /> <embed src="http://blip.tv/play/gcMV" type="application/x-shockwave-flash" width="1024" height="798" allowscriptaccess="always" allowfullscreen="true"></embed> </video> If HTML5 video is not supported, flash video will load Progressive Enhancement

Support for older browsers Use polyfills to fallback gracefully or mimic functionality HTML5Shim Modernizr Explorercanvas Socket.IO Big List of Polyfills: http://bit.ly/b5HV1x Polyfills

I’m asking you, the developer, to look at the technology that’s available to you and chose the solution that suits your problem best. If that happens to be an HTML5 technology, or a non-HTML5 API, or even Flash, you’ve chosen the individual specific technology, not a f**king buzzword. Remy Sharp, 10/7/10 http://bit.ly/cQUGdM

http://html5.timothyfisher.com http://diveintohtml.com http://html5doctor.com/ http://html5demos.com http://caniuse.com http://html5rocks.com Resources

Introducing HTML5 (Bruce Lawson & Remy Sharp) HTML5: Up and Running (Mark Pilgrim) Books

Timothy Fisher http://html5.timothyfisher.com Credit

@reybango blog.reybango.com [email_address]

HTML5 Overview

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