HTML5, part I – markup Štěpán Bechynský, @stepanb Developer Evangelist Microsoft, Czech Republic.
Post on 14-Dec-2015
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What is HTML5?
HTML5 is future of the web development
HTML5 is future platform for some consumer applications
HTML5 is future platform for connected devices (smartphones, tablets)
Web Performance Working Group
HTML5 is multiplatform
HTML5 is markup or set of more technologies
HTML5 is not final HTML5 Markup Last Call started on 24th of May 2011 http://lists.w3.org/Archives/Public/public-html/2011May/0162.html
History
1998 – W3C, future is XML, HTML 4.01 is last version XHTML 2.0 Problems with backward compatibility
Web Hypertext Application Technology Working Group Individuals from Opera, Apple, Google Unhappy with XHTML Web Forms 2.0 Web Applications 1.0
2006 – W3C, XHTML: We were overoptimistic…
2009 – W3C stopped working on XHTML and move resources to HTML5
W3C HTML Working Group Head
Sam Ruby (IBM) Paul Cotton (Microsoft) Maciej Stachowiak (Apple)
40 companies, 411 coworkers, 280 experts
8 publications HTML5 HTML Canvas 2D Context HTML: The Markup HTML5 diffs from HTML4 Polyglot Markup
Recommendations are for free
W3C
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2
Status of HTML5
First Public
Working Draft
Working Draft Last Call
Candidate
Recommendation
Recommendation
HTML5 is not finished!
Web Browser vendors use vendor prefixes for unstable parts of specification
CSS -moz-* -webkit-* -ms-* -o-*
Javascript ms moz webkit
Philosophy of HTML5 HTML describes only structure of document
It must be closer to industry needs
Not breaking the Web
Specification describes how-to create DOM from non-valid HTML5 document
You know this<!doctype html><html lang=cs>
<head><meta charset=utf-8><title>HTML5</title>
</head><body>
<p>Toto je validní HTML5</p>
</body></html>
HTML5 is not XML
<META CHARSET=UTF-8><META CHARSET=UTF-8 /><META CHARSET=”UTF-8”><META CHARSET=”UTF-8” /><meta charset=utf-8><meta charset=utf-8 /><meta charset=”utf-8”><meta charset=”utf-8” /><MeTa CHARset=utF-8>
Back to roots
Current semantics elements <h1>, <h2>, <strong>, …
But what is <div>?
Source: Introducing HTML5
The article element
The article element represents a self-contained composition in a document, page, application, or site and that is, in principle, independently distributable or reusable, e.g. in syndication. This could be a forum post, a magazine or newspaper article, a blog entry, a user-submitted comment, an interactive widget or gadget, or any other independent item of content.
When article elements are nested, the inner article elements represent articles that are in principle related to the contents of the outer article. For instance, a blog entry on a site that accepts user-submitted comments could represent the comments as article elements nested within the article element for the blog entry.
Source: http://dev.w3.org/html5/spec/sections.html#the-article-element
Microdata
Add more semantics to elements
Supported by search engines Bing, Google, Yahoo
Dictionaries on http://www.schema.org/
Attributes itemscope itemtype itemprop itemref itemid
Custom data attributes
Custom data typically used by application
Syntax: data-my-key
Example of usages – jQuery Mobile
<div data-role="page">
<div data-role="content">
…
</div>
</div>
Forms
Input types with validation Email, url, number, tel, search
Attributes for better control of input Required, Placeholder, Pattern, Autofocus, Min, Max, Step, Multiple,
List
Psedoclasses for CSS rules :valid/:invalid, :required/:optional
Event invalid
Event property validity
Multimedia
Box element You can use CSS
Element audio AAC, MP3 Ogg Vorbis
Element video H.264 (industry standard) WebM (forced by Google) Ogg Theora (forced by Opera)
<video width="400" height="300" poster="frame.png" autoplay controls loop><source src="video.ogv" type='video/ogg; codecs="theora, vorbis"'><source src="video.mp4" type='video/mp4; codecs="avc1.42E01E,
mp4a.40.2"'></video>
Graphics using <canvas>
2D Graphics Element canvas Draw using Javascript Result is bitmap
3D Graphics Is Not part of W3C recommendation WebGL by Independent group Khronos Security issues
http://www.contextis.co.uk/resources/blog/webgl/
Animation Performance requestAnimationFrame Doesn’t run, when page is not visible You will need to count “game” time
Resources
Books Introducing HTML5 by Bruce Lawson & Remy Sharp
W3C W3C HTML5 Specification – www.w3.org/TR/html5 HTML5 Test Suite – test.w3.org/html/tests/reporting/report.htm Validator – validator.w3.org/
Microsoft Internet Explorer 9 and 10 Engineering Blog – blogs.msdn.com/ie/ Beauty Of The Web – www.beautyoftheweb.com/experience/ IE Test Drive – www.ietestdrive.com HTML5 Labs – html5labs.interoperabilitybridges.com/
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