Transmission 2. Pat Lauke (Opera): Future of Web Technologies

The future of web technologies WEB STANDARDS, CROSS-DEVICE DEVELOPMENT AND THE WEB AS UBIQUITOUS PLATFORM Patrick H. Lauke / Transmission2 #tx2 / Manchester / 25 November 2009

Web Evangelist at Opera

1. new web standards 2. adaptive content 3. browser as platform

new technologies you can start using today

HTML5 <!DOCTYPE html>

HTML5 does not replace HTML 4.01

HTML5 has more bling!

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

HTML5 is umbrella term: markup elements and JavaScript APIs

new elements for more accurate semantics

HTML5 elements for a typical blog

HTML5 – unambiguous and machine readable

current and old browsers “support” these new elements (although some need a little extra help)

webforms – more powerful form elements

standardise commonly-used rich form elements – without JavaScript

built-in validation (of course you should still validate on the server) Demonstration of webforms

canvas = “scriptable images”

canvas has standard API methods for drawing ctx = canvas.getContext("2d"); ctx.fillRect(x, y, width, height); ctx.beginPath(); ctx.moveTo(x, y); ctx.lineTo(x, y); ctx.bezierCurveTo(x1, y1, x2, y2, c1, c2);

canvas mixing things up with external graphics ctx = canvas.drawImage(…) Demonstration of canvas

<video>

<video src="video.ogv" controls autoplay poster="poster.jpg" width="320" height="240"> <a href="video.ogv">Download movie</a> </video>

video as native object...why is it important? ● “play nice” with rest of the page ● keyboard accessibility built-in ● API for controls Demonstration of video in Presto 2.4

video format debates – MP4 vs OGG Theora <video controls autoplay poster="…" width="…" height="…"> <source src="movie.ogv" type="video/ogg" /> <source src="movie.mp4" type="video/mp4" />  </video> still include fallback for old browsers http://camendesign.com/code/video_for_everybody

video and canvas on any device without plugins (Java / Flash / Silverlight not ubiquitous)

IANAL, but … EOLAS?

and many more... (geolocation, drag and drop, web workers, offline support, storage)

Mobile web and why it matters www.opera.com/smw

Opera Mini: +150% users, +224% traffic 15 Billion pages served / month September 2008 - 2009

"Our goal is to take the one true Web and make it available to people on their terms." Jon S. von Tetzchner, Opera Co-founder & CEO

“One Web” is an uneven landscape: ● constrained browsers (WAP, …) ● mobile “Full Web” (Android, Opera Mobile, …) ● proxy-based (Opera Mini, …) ● laptop, Netbook, Tablet PC, Desktop ● games consoles, set-top boxes, TVs

Device capabilities also vary: ● screen size and resolution ● input mechanism – touch, keypad, other? ● memory and processing power ● colour palettes ● connection speed / quality

Approaches to cross-device development: ● do nothing – use standards, defensive design ● separate site (m.mysite.com, mysite.mobi) ● single site, but optimised for cross-device

CSS 2.1 Media Types: ● print, screen, handheld, projection, tv, … ● partially supported ● lump all devices into single categories http://www.w3.org/TR/CSS21/media.html

CSS 2.1 Media Types: <link rel="stylesheet" ... media="print" href="..."> @import url("...") print; @media print { // insert CSS rules here }

CSS 3 Media Queries: ● build and extend CSS 2.1 Media Types ● more granular control of capabilities ● width, height, orientation, color, resolution, … http://www.w3.org/TR/css3-mediaqueries/

CSS 3 Media Queries: @media screen and (max-device-width: 480px) { // insert CSS rules here } Demonstration of Media Queries

CSS 3 Media Queries and SVG: ● SVG already resolution independent ● ideal for device interfaces, maps, graphs, … ● combination with CSS 3 Media Queries Demonstration of Media Queries + SVG

Full Web is not always practical or desirable

Widgets are nothing new Yahoo! Widgets (aka Konfabulator), OS X Dashboard, Windows Sidebar, Adobe Air, iPhone Apps, Android Apps, …

“…the browser run-time is perfect…you’re out of writing for Windows Mobile, Android, S60, each of which require testing...we want to abstract that. All the cool innovation is happening inside the browser – you don’t need to write to the native operating system anymore.” Mobile Entertainment Market , June, 2009

W3C Widgets – application development filled with web standards goodness, using browser engine as platform

Widgets on desktop, mobile, TV … fridge?

Opera had widget capability for a long time … latest 10.20 alpha widgets as standalone apps dev.opera.com/articles/view/widgets-as-standalone-applications

Standardised JavaScript APIs to access device-specific capabilities (JIL / BONDI)

www.opera.com/developer people.opera.com/patrickl/presentations/Transmission2_25.11.2009/Transmission2_25.11.2009.pdf patrick.lauke@opera.com

http://khmerwebdeveloper.wordpress.com	12
http://posterous.com	1
http://chrisrutz.de	1

Transmission 2. Pat Lauke (Opera): Future of Web Technologies

by Digital Sparks

Accessibility

Categories

Upload Details

Usage Rights

3 Embeds 14

Statistics

Transmission 2. Pat Lauke (Opera): Future of Web Technologies Presentation Transcript