Bruce Lawson HTML5 South By SouthWest presentation

[email_address] , http://dev.opera.com www.brucelawson.co.uk twitter.com/brucel

Opera
Opera 10.50 – the world's fastest browser
Opera Mini – the world's most popular browser for mobile phones
Norwegian! (But I'm from the UK)

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Tales from development trenches
Tales of the development of HTML5
Tales of developing with HTML5

A journey through tyme and spayce

1998
“ "In discussions, it was agreed that further extending HTML 4.0 would be difficult, as would converting 4.0 to be an XML application. The proposed way to break free of these restrictions is to make a fresh start with the next generation of HTML based upon a suite of XML tag-sets."
Dec 1999: HTML 4.01 Specification, W3C Recommendation

XHTML 2 <img>

Web Applications 1.0
2003: Started by Opera
Then Mozilla (Apple “cheering from sidelines”)
WHATWG
(Later: Google, Microsoft involved)

HTML5
2006: W3C restarts HTML, using Web Applications 1.0 as a basis for “HTML 5”
2009: XHTML2 killed
2010 WHAT-WG goes to last call
Not yet completed, but getting there
Giant spec (900pp)
Already some implementations of some parts

Evolution of HTML: monkey on left becomes human in 4 stages THIS IS A TITLW THIS IS A DESCRIPTION

Evolution of HTML: 5 th monkey (HTML5) is human but dressed in pimp clothing

HT M L5 “ ... 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 http://lists.w3.org/Archives/Public/public-html/2009Jan/0215.html

Why do Open Standards matter? The most important program on your computer is your Web Browser.

Your web browser Helps you search for information (Google, Yahoo!)

Your web browser Lets you be social with friends (Facebook, Friendster, Twitter)

Your web browser Lets you write boring work documents (Office online, Google Docs)

I email my girlfriend Picture credit: : http://en.wikipedia.org/wiki/Angelina_jolie

Theresa goes shopping

</soapbox>

What people really want to do 1 footer 2 content 3 header 4 logo 5 container 6 main 8 menu 11 search 12 nav 13 wrapper 14 top 17 sidebar 19 banner 20 navigation http://devfiles.myopera.com/articles/572/idlist-url.htm

More semantics for structure

HTML 5/ ARIA overlaps
<header> sometimes = role=”banner”
<footer> is sometimes role=”contentinfo”
<nav> is usually role=”menu”
In forms (next slide) required is aria-required=”true”
Draggable attribute matches aria-draggable
Validator.nu validates ARIA and HTML 5
Hixie: “ When there’s a built-in way to do something, using that is the simplest and most reliable solution. ” Me: “ Do both, for now ”

HTML5 forms (“Webforms 2”) Coding form validation isn't much fun

Validate an email address <script language = "Javascript"> function echeck(str) { var at="@" var dot="." var lat=str.indexOf(at) var lstr=str.length var ldot=str.indexOf(dot) if (str.indexOf(at)==-1){ alert("Invalid E-mail ID") return false } if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){ alert("Invalid E-mail ID") return false } if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){ alert("Invalid E-mail ID") return false } if (str.indexOf(at,(lat+1))!=-1){ alert("Invalid E-mail ID") return false } if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){ alert("Invalid E-mail ID") return false } if (str.indexOf(dot,(lat+2))==-1){ alert("Invalid E-mail ID") return false } if (str.indexOf(" ")!=-1){ alert("Invalid E-mail ID") return false } return true } function ValidateForm(){ var emailID=document.frmSample.txtEmail if ((emailID.value==null)||(emailID.value=="")){ alert("Please Enter your Email ID") emailID.focus() return false } if (echeck(emailID.value)==false){ emailID.value="" emailID.focus() return false } return true } </script>

HTML5 forms (“Webforms 2”) Do what people want to do without scripting, so
Easier to write
Controls look the same across sites, so better UX
Built-in validation
Less to download
Demonstration

HTML5 forms (“Webforms 2”) For a happy life of love, laughter and liquor

HTML5 forms (“Webforms 2”) … or TRIPLE your money back!!!

HTML5 forms (“Webforms 2”) Image: http://www.flickr.com/photos/figgenhoffer/3662160468/

Canvas Immediate graphics mode without plugins Retro-specced, hence accessibility concerns Native support in Opera, Safari, Firefox and Chrome Demonstration

What does this code do? <object width="425" height="344"> <param name="movie" value="http://www.example.com/v/LtfQg4KkR88&hl=en&fs=1"></param> <param name="allowFullScreen" value="true"></param> <embed src="http://www.example.com/v/LtfQg4KkR88&hl=en&fs=1" type="application/x-shockwave-flash" allowfullscreen="true" width="425" height="344"></embed> </object>

HTML5 video Anne van Kesteren, 2007: “ Opera has some internal experimental builds with an implementation of a <video> element. The element exposes a simple API (for the moment) much like the Audio() object: play(), pause(), stop(). The idea is that it works like <object> except that it has special <video> semantics much like <img> has image semantics.”

Video (future) <video src=video.ogv> </video>

Video (future)

The take-homes
HTML5 doesn't break the Web
Is sometimes an ugly kludge
Can be serialised as XML: XHTML5
Defines HTML error-handling to keep consistent DOM
Adds new elements and APIs for open standard apps
Is coming soon, to a browser near you

Thank you Vegas Austin

Bruce Lawson HTML5 South By SouthWest presentation

by brucelawson on Mar 14, 2010

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Bruce Lawson HTML5 South By SouthWest presentation — Presentation Transcript

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