The document discusses the evolution of HTML, highlighting the advancements in HTML5 that support web applications and improve user experience. Key features include better semantics, improved forms, and native multimedia support such as video and audio. It also mentions accessibility considerations and various HTML5 enhancements like drag and drop, web storage, and server-sent events.

1. brucel@opera.com, http://dev.opera.com
www.brucelawson.co.uk twitter.com/brucel

2. ●

3. Evolution of HTML: monkey on
left becomes human in 4 stages

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

5. HTML5
“... 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

6. More semantics for structure

7. Styling HTML 5
Good browsers just work, with a
hint or two:
header
{display:block;}

9. Naughty browsers
IE – needs JavaScript
document.createElement('header')
http://html5doctor.com/how-to-get-html5-working-in-ie-and-
firefox-2/

11. <section>
<h1>I'm a heading</h1>
<section>
<h1>And I'm a heading</h1>
<section>
<h1>I'm a heading too</h1>
<article>
<h1>And me! And me!</h1>
</article>
</section>
</section>

12. <figure>
● “ to annotate illustrations, diagrams, photos, code listings, etc, that
are referred to from the main content of the document”
<figure>
<img src=bruce.png alt=””>
<figcaption>
Bruce Lawson in summer dress
<small>Photo copyright Bruce's mum</small>
</figcaption>
</figure>

13. Example of <figure>
Bruce Lawson in summer dress
Photo copyright Bruce's mum
•

14. 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

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

16. 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&f
s=1" type="application/x-shockwave-flash"
allowfullscreen="true" width="425"
height="344"></embed>
</object>

17. Video (future)
<video src=video.ogv>
<p>You've got a legacy browser, so
<a href="video.ogv">Download movie</a>
</p>
</video>
•

18. Advantages of native <video>
● Keyboard accessible out of the box (potentially)
● Is part of the page – can be styled by CSS
● Can script own controls (show code!)
● Can draw on the video
● Can manipulate video data (SVG/ copy to canvas)

19. Video (accessibility)
● Captions/ subtitles – no standardised way (yet).
● Bruce hack:
<video></video>
<div class=transcript>
<p>Hello, Good Evening and Welcome</p>
<p>Tonight on the Jeremy Kyle show ...</p>
....
</div>

20. Video (accessibility)
<div class=”transcript”>
<p><span>Hello, Good Evening</span>
<span> and Welcome.</span></p>
<p><span>Tonight on the Jeremy Kyle show …
</span>
</p>
....
</div>

21. Video (accessibility)
<p>
<span data-begin=1 data-end=2.4>Hello, Good
Evening</span>
<span data-begin=3 data-end=3.6> and Welcome.</span>
</p>

22. Video (accessibility)
function timeupdate() {
var v = document.querySelector('video');
var now = v.currentTime; …}
<video width=600 src=synergy.ogv
ontimeupdate=timeupdate()>
Demonstrate captions
Demonstrate simultaneous translation

23. Disadvantage with video: codecs
<video width=320 height=240 controls>
<source src="../videos/turkish.ogv" type="video/ogg">
<source src="../videos/turkish.mp4" type="video/mp4">
<p> Download the <a href=turkish.ogv>Turkish dancing
masterclass video</a></p>
</video>

24. Nastiest slide in the world
1 <video width="640" height="360" poster="__POSTER__.jpg" controls="controls">
2 <source src="__VIDEO__.ogv" type="video/ogg" />
3 <source src="__VIDEO__.mp4" type="video/mp4" /><!--[if gt IE 6]>
4 <object width="640" height="375" classid="clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B"><!
5 [endif]--><!--[if !IE]><!-->
6 <object width="640" height="375" type="video/quicktime" data="__VIDEO__.mp4"><!--<![endif]-->
7 <param name="src" value="__VIDEO__.mp4" />
8 <param name="autoplay" value="false" />
9 <param name="showlogo" value="false" />
10 <object width="640" height="380" type="application/x-shockwave-flash"
11 data="__FLASH__.swf?image=__POSTER__.jpg&amp;file=__VIDEO__.mp4">
12 <param name="movie" value="__FLASH__.swf?image=__POSTER__.jpg&amp;file=__VIDEO__.mp4" />
13 <img src="__POSTER__.jpg" width="640" height="360" />
14 <p>
15 <strong>No video playback capabilities detected.</strong>
16 Why not try to download the file instead?<br />
17 <a href="__VIDEO__.mp4">MPEG4 / H.264 “.mp4” (Windows / Mac)</a> |
18 <a href="__VIDEO__.ogv">Ogg Theora &amp; Vorbis “.ogv” (Linux)</a>
19 </p>
20 </object><!--[if gt IE 6]><!-->
21 </object><!--<![endif]-->
22 </video>

26. HTML5 goodies
● Drag and drop
● Cross-window, Cross-domain messaging
● Web workers
● Adding toolbars <menu>, <command>
● WebStorage
● Register protocol handler, content type handlers
● Server-sent events <eventsource>
● (Geolocation)

27. Mwah! mwah!
brucel@opera.com, http://dev.opera.com
www.brucelawson.co.uk, twitter.com/brucel
www.html5doctor.com, www.html5demos.com