Comparison of layout engines (HTML5) Informatics Science 464 pasar.pts-ptn.net

HTML and HTML5; HTML editor
Dynamic HTML
XHTML
- XHTML Basic (Mobile)
- XHTML Mobile Profile and C-HTML
HTML element
Character encodings; Unicode
Language code
Document Object Model
Browser Object Model
Style sheets and CSS
Font family and Web colors
HTML scripting and JavaScript
W3C, WHATWG, and validator
Quirks mode
HTML Frames
HTML5 Canvas, WebGL, and WebCL
HTML5 Audio and HTML5 video
Web storage
Web browser (layout) engine
Comparison of
- document markup languages
- web browsers
- layout engine support for
  - HTML;　Non-standard HTML
  - XHTML (1.1)
  - HTML5; HTML5 canvas,
    - HTML5 media　(Audio, Video)

The following tables compare support of HTML5 differences from HTML for a number of layout engines.

The specification is still a working draft, not a W3C recommendation, and thus not stable. Unless otherwise specified in footnotes, comparisons are based on the stable versions of the programs without any add-ons, extensions or external programs.

Explanation of the tables

Engine nomenclature

Rather than the names of web browsers, the names of the underlying engines are used. The browsers that use the various engines are listed below.

Layout engine	Release version	Preview version	Used by
Amaya	11.3.1	11.3-pre	Amaya
Gecko	19.0	20.0	All Mozilla software, including Firefox; SeaMonkey and Galeon; Camino; K-Meleon; Flock (up to 2.x); Debian IceWeasel; GNU IceCat (formerly GNU IceWeasel); Icedove, Iceape and Iceowl; Fennec. Also used by the Maple platform in 2010 and 2011 Samsung "SmartTV" devices which are based on the build used in Firefox 3.0.
KHTML		N/A	Konqueror^†
Presto	2.10.229	2.10.238	Opera; Opera Mobile, Nintendo DS & DSi Browser; Internet Channel
Tasman	(IE 5.2.3 for Mac)	none (aborted in 2003)	Internet Explorer 5+ for Mac OS X
Trident	6.0 (IE 10)	6.0 (IE 10)	Internet Explorer and other Internet Explorer shells like Maxthon (Microsoft Windows operating systems only), Windows Phone 8
WebKit	534.20	r146740	Tizen (both OS and browser), Safari (both desktop and mobile), Google Chrome, Maxthon 3, Shiira, iCab 4, OmniWeb 5.5+, Web, Adobe AIR, Midori, Adobe Dreamweaver CS4 and CS5, Android browser, Palm webOS browser, Symbian S60 browser, OWB, Steam, Rekonq, Arora, Flock (version 3+), RockMelt, Dolphin Browser, Sleipnir, Konqueror^†, rekonq. Used by the LG Smart TV platform to enable web content on TVs.

^† In Konqueror, the user can switch layout engine.

Values

Values indicate the level of support in the most recent version of the layout engine, or (if a version number is given) in the specified version. Version numbers without any other value indicate the version at which the layout engine first fully supported the feature.

Value	Meaning
Yes	Indicates that the layout engine fully supports this property/element when valid values are used.
No	Indicates that the property/element is completely ignored.
Partial	Indicates that the property/element is understood, but that not all values are supported. Supported values are implemented correctly.
Incorrect	Indicates that the property/element is understood, but that it is not implemented correctly in all cases.
Experimental	Indicates that the property/element is understood, but supported under an alternate name. May be incomplete or buggy.
Dropped	Indicates that the property/element is no longer supported.
Nightly build	Indicates that the property/element is supported to some extent in an experimental/nightly build. Future support is expected.
Depends	Indicates that the property/element is supported only on certain platforms, or if certain settings are configured.

Elements

See also: Comparison of layout engines (HTML5 Media) and Comparison of layout engines (HTML5 Canvas)

While many of these elements, such as section, have not been implemented natively in layout engines, support may be very easy to emulate using CSS or JavaScript.

	Trident	Gecko	WebKit	Presto
`section`	5.0^{[t 1]}	2.0^{[g 1]}^{[g 2]}	533^{[w 1]}^{[w 2]}^{[w 3]}^{[w 4]}^{[w 5]}^{[w 6]}	2.7.70
`nav`
`article`
`aside`
`hgroup`
`header`
`footer`
`time`	No	22.0^{[g 3]}	No	2.8.146
`mark`	5.0^{[t 1]}	2.0^{[g 4]}	Yes^{[w 7]}	2.7.70
`ruby`,^[1] `rt`, `rp`	3.1^{[t 2]}	No^{[g 5]}	533^{[w 8]}^{[w 9]}	No
`dialog`	No	No^{[g 6]}	No^{[w 10]}	No
`figure`	5.0^{[t 1]}	2.0^{[g 7]}	Yes^{[w 11]}	2.7.70
`figcaption`	5.0^{[t 1]}	2.0^{[g 7]}	Yes^{[w 11]}	2.7.70
`embed`	<3.1^{[IE 3.0]}	1.7	85	1.0
`video`	5.0 (Partial)^{[t 3]}^{[t 4]}	15.0 ^{[g 8]}	525	2.5^{[note 1]}^{[note 2]}
`audio`
`source`
`canvas`		1.9.2^{[g 9]}	Partial	2.0^{[p 4]}
Inline MathML	No	2.0	Yes^{[w 12]}^{[w 13]}	2.1^{[note 3]}
Inline SVG	5.0^{[t 3]}	2.0	Yes^{[w 13]}	2.9.220^{[p 6]}
`details`	No	No ^{[g 10]}	Yes ^{[w 14]}	No
`summary`		No ^{[g 10]}	Yes ^{[w 14]}
`command`		No ^{[g 11]}	No
`menu`		8.0 ^{[g 12]}	No^{[w 15]}	2.8^{[p 7]}
`bdi`		10.0^{[g 13]}	528^{[w 16]}	No
`data`	No	22.0^{[g 14]}	No	No
	Trident	Gecko	WebKit	Presto

Attributes

Element-specific

Attribute	Element	Trident	Gecko	WebKit	Presto
`manifest`	`html`	6.0^[2]	1.9	Yes	2.6^{[p 8]}^{[p 9]}
`sizes`	`link`	No	8.0 (only mobile)^{[g 15]}^{[g 16]}	Yes^{[w 17]}	No
`charset`	`meta`	4.0^[3]	1.9.2	Yes	2.5.24
`scoped`	`style`	No	21.0^{[g 17]}	No^{[w 18]}	No
`async`	`script`	6.0	1.9.2^{[g 18]}	Yes^{[w 19]}
`reversed`	`ol`	No	18.0^{[g 19]}	Yes^{[w 20]}
`download`	`a,area`	No	20.0^{[g 20]}	Yes
`sandbox`	`iframe`	6.0^{[t 5]}	17.0^{[g 21]}	533^{[w 21]}
`seamless`	`iframe`	No	No^{[g 22]}	No^{[w 22]}
Attribute	Element	Trident	Gecko	WebKit	Presto

Global

	Trident	Gecko	WebKit	Presto
`translate`^[4]	No
Datasets (`data-*`)	No	6.0^{[g 23]}	Yes^{[w 23]}	2.8^{[p 10]}
`contextmenu`		8.0^{[g 24]}	No^{[w 24]}	No
`hidden`		2.0^{[g 25]}	Yes^{[w 25]}	2.7.70
`contenteditable`^[5]	<3.1^{[IE 5.5]}	1.9	Yes	2.0
`spellcheck`^[6]	6.0	1.8^{[g 26]}	Incorrect^{[w 26]}	2.8^{[p 11]}
`draggable`	6.0	1.9.1^{[g 27]}	533^{[w 27]}	2.10.270
`dropzone`	No	No^{[g 28]}	Yes	2.10.270
	Trident	Gecko	WebKit	Presto

Form elements and attributes

Many of these features can be emulated with third-party libraries^{[citation needed]}.

	Trident	Gecko^{[g 29]}	WebKit^{[w 28]}	Presto^{[p 12]}
Attributes
`autocomplete`	3.1	Yes	Yes	2.0
`list`	6.0^{[t 6]}	2.0^{[g 30]}	No^{[w 29]}
`required`	6.0^{[t 7]}	2.0^{[g 31]}	528^{[note 4]}^{[w 30]}
`multiple`	6.0^{[t 8]}	1.9.2^{[note 5]}^{[g 32]}	526^{[note 5]}^{[w 31]}	2.7^{[p 13]}
`pattern`	6.0^{[t 9]}	2.0^{[g 33]}	528^{[note 4]}^{[w 32]}^{[w 30]}	2.0
`min`, `max`	6.0^{[t 10]}^{[t 11]}	16.0^{[g 34]}^{[g 35]}	Yes^{[w 33]}
`step`	6.0^{[t 12]}	16.0^{[g 36]}	528^{[w 34]}
`placeholder`	6.0^{[t 13]}	2.0^{[g 37]}	Yes	2.7^{[p 13]}
`form`	No	2.0^{[g 38]}	Yes^{[w 35]}	2.0
`autofocus`	6.0^{[t 14]}	2.0^{[g 39]}	528^{[w 36]}
`maxlength`	6.0^{[t 15]}	2.0^{[g 40]}	528^{[w 37]}
`novalidate`	6.0^{[t 16]}	2.0^{[g 41]}	528^{[w 38]}	2.8^{[p 14]}
`control`	No	2.0^{[g 42]}	No	No
`accept`	No	2.0^{[g 43]}	Yes^{[w 39]}	Yes
`formtarget`	6.0^{[t 17]}	2.0^{[g 44]}	Yes^{[w 40]}	2.8^{[p 15]}
`formaction`	6.0^{[t 18]}	2.0^{[g 45]}	Yes^{[w 40]}	2.8^{[p 16]}
`formmethod`	6.0^{[t 19]}	2.0^{[g 46]}	Yes^{[w 40]}	2.8^{[p 17]}
`formenctype`	6.0^{[t 20]}	2.0^{[g 46]}	Yes^{[w 40]}	2.8^{[p 18]}
`formnovalidate`	6.0^{[t 21]}	2.0^{[g 47]}	528^{[w 38]}	2.8^{[p 19]}
`disabled` (fieldset element)	<3.1	2.0	No	2.7
Elements
`datalist`	6.0^{[t 22]}	2.0^{[g 48]}	No^{[w 41]}	2.0
`keygen`^[7]	No^{[t 23]}	1.0^{[g 49]}	125	1.0
`output`	No	2.0^{[g 50]}	Yes^{[w 42]}	2.0
`progress`	6.0^{[t 24]}	6.0^{[g 51]}	Yes^{[w 43]}	2.7^{[p 13]}
`meter`	No	16.0^{[g 52]}	Yes^{[w 44]}	2.7^{[p 13]}
Input types
`search`	6.0^{[t 25]}	2.0^{[g 53]}	312^{[w 45]}	2.7^{[p 13]}
`tel`	6.0^{[t 26]}	2.0^{[g 54]}	528^{[w 46]}	2.7^{[p 13]}
`url`	6.0^{[t 27]}	2.0^{[g 55]}	528^{[w 46]}	2.0
`email`	6.0^{[t 28]}	2.0^{[g 56]}	528^{[w 46]}
`datetime`	No	No^{[g 57]}	Partial^{[w 47]}^{[w 48]}
`date`	No
`month`	No
`week`	No
`time`	No
`datetime-local`	No
`number`	6.0^{[t 29]}	16.0^{[g 58]}	528^{[w 46]}
`range`	6.0^{[t 30]}	22.0^{[g 59]}	Yes
`color`	No	No^{[g 60]}	Yes^{[w 49]}	2.7^{[p 13]}
	Trident	Gecko	WebKit	Presto

APIs

	Trident	Gecko	WebKit	Presto
`getElementsByClassName`^[8]	5.0^{[t 31]}	1.9^{[g 61]}	525	2.1
`registerProtocolHandler`	No	1.9^{[note 6]}	Yes^{[w 50]}	2.10^{[p 20]}
`registerContentHandler`	No	1.8^{[note 7]}	Yes^{[w 50]}	2.10^{[p 20]}
Cross-document messaging^[9]	4.0	1.9^{[g 64]}	Yes	2.0
Drag-and-drop	6.0	1.9.1^{[g 27]}	Yes	2.10.270^{[p 21]}
`pushState()` and `replaceState()`	6.0^{[t 32]}	2.0^{[g 65]}	528^{[w 51]}	2.9^{[p 22]}
	Trident	Gecko	WebKit	Presto

Other features

	Trident	Gecko	WebKit	Presto
Microdata	No	16.0^{[g 66]}	No^{[w 52]}	Yes^{[p 20]}
HTML5 Tokenizer	6.0^{[t 33]}	2.0^{[g 67]}	Yes^{[w 53]}	2.10^{[p 23]}
HTML5 Tree Builder			Yes^{[w 13]}
HTML5 Fragment Parser			Yes
`<a rel="noreferrer">`	No	No^{[g 68]}	Yes^{[w 54]}	No
`window.onhashchange`	4.0^{[t 34]}	1.9.2^{[g 69]}	528^{[w 55]}	2.6^{[p 24]}
`element.classList`	No	1.9.2^{[g 70]}	Yes^{[w 56]}	2.8^{[p 25]}
`dir="auto"`	No	20.0^{[g 71]}	528+^{[w 57]}	No
	Trident	Gecko	WebKit	Presto

Next-generation additions

The WHATWG version of HTML also includes additional features that are not technically HTML5, which are described as "next-generation additions still in development" in the specification.^[10]

	Trident	Gecko	WebKit	Presto
`<device>`	No	No	No	No
`<track>`	6.0^{[t 35]}	No	No
`<a ping>`	No	Depends^{[g 72]}^{[note 8]}	Depends^{[w 58]}^{[note 9]}

Related specifications

	Trident	Gecko	WebKit	Presto
`main` element^[11]	No	21.0^{[g 75]}	No^{[w 59]}	No
`template` element^[12]	No	No	No^{[w 60]}	No
Selectors API^[13]	4.0^{[t 36]}	1.9.1^{[g 76]}	525^{[w 61]}	2.2^{[p 26]}
Web Storage^[14]	4.0	1.9.1^{[g 77]}	525	2.5^{[p 27]}
Indexed Database API^[15]	5.0^{[t 37]}	16.0^{[g 78]}	Partial	No
Web SQL Database (obsolete)^[16]	No	No^{[g 79]}	Yes^{[w 62]}	2.5^{[p 27]}
File API^[17]	5.0	Yes^{[g 80]}	Yes^{[w 63]}^{[w 64]}	2.8^{[p 28]}
File API: Writer^[18]	5.0	No^{[g 81]}	Partial^{[w 65]}	No
File API: Directories and System^[19]	No	No^{[g 82]}	Yes^{[w 66]}	No
Media Capture API^[20]		2.0^{[note 10]}	No	2.10^{[p 29]}
Server-sent events^[21]		6.0^{[g 84]}	Yes^{[w 67]}	2.7^{[p 30]}^{[p 31]}
WebSocket^[22]	6.0^{[t 38]}	11.0^{[g 85]}	533	2.11^{[note 11]}
Web Workers^[23]^[24]	6.0^{[t 39]}	1.9.1^{[g 86]}	Yes	2.6^{[p 8]}^{[p 9]}
Geolocation API^[25]	5.0^{[t 40]}	1.9.1^{[g 87]}	533^{[w 68]}	2.6^{[note 12]}
Offline Web applications^[26]	6.0^{[t 41]}	1.9.1^{[g 88]}	Yes	2.6^{[p 8]}^{[p 9]}
Web Notifications^[27]	No	22.0^[28]^[29]	only in Chrome^[30]	?
	Trident	Gecko	WebKit	Presto

Notes

^ Beginning in 2007,^{[p 1]} several experimental builds have been released with Ogg Theora support. Full support for the video element is included in Presto 2.5.^{[p 2]}
^ Presto added very limited support for the ECMAScript API related to the audio element in version 2.0 using only the WAV PCM codec, while not implementing the element itself.^{[p 3]} Full support for the audio element with the Ogg Vorbis and WAV codecs is included in Presto 2.5.^{[p 2]}
^ MathML for CSS, XHTML only^{[p 5]}
^ ^a ^b Form validation disabled in Safari Can I use... Support tables for HTML5, CSS3, etc..
^ ^a ^b For file inputs only.
^ Limited to the feed protocol in 1.8; fully supported in 1.9.^{[g 62]}
^ Limited to feed MIME types in 1.8 and 1.9.^{[g 63]}
^ The ping attribute is disabled by default, due to privacy concerns.^{[g 73]}^{[g 74]}
^ The ping attribute is disabled by default, thus needs to be manually enabled by each port
^ Currently partially supported in nightly builds for the Linux platform.^{[g 83]}
^ WebSocket support was added in Presto 2.7^{[p 32]} but was disabled due to security reasons.^{[p 33]} In Presto 2.11 protocol implementation was updated to version RFC 6455^{[p 34]} which resolved security issue.
^ Geolocation support was added in Presto 2.5, but was not enabled by default until 2.6.^{[p 35]}^{[p 36]}^{[p 8]}^{[p 9]}

References

Trident references

^ ^a ^b ^c Internet Explorer Platform Preview Guide for Developers, Microsoft, http://msdn.microsoft.com/en-us/ie/ff468705.aspx
^ Ruby, http://docs.google.com/View?id=dcgd8hk6_0ccsw4td4
^ ^a ^b Bisson, Simon (2010-09-17), Microsoft previews Internet Explorer 9 with HTML5 support, ZDNet, http://www.zdnet.co.uk/news/desktop-apps/2010/03/17/microsoft-previews-internet-explorer-9-with-html-5-support-40088334/
^ Hachamovitch, Dean (2010-06-23), HTML5, Native: Third IE9 Platform Preview Available for Developers, Microsoft, http://blogs.msdn.com/b/ie/archive/2010/06/23/html5-native-third-ie9-platform-preview-available-for-developers.aspx
^ Rossi, Jacob (2011-07-14), Defense in Depth: Locking Down Mash-Ups with HTML5 Sandbox, Microsoft, http://blogs.msdn.com/b/ie/archive/2011/07/14/defense-in-depth-locking-down-mash-ups-with-html5-sandbox.aspx
^ "list attribute | list property (Internet Explorer)". Microsoft. http://msdn.microsoft.com/en-us/library/ie/hh772937. Retrieved 16 November 2012.
^ "required attribute | required property (Internet Explorer)". Microsoft. http://msdn.microsoft.com/en-us/library/ie/hh772943. Retrieved 16 November 2012.
^ "multiple property (Internet Explorer)". Microsoft. http://msdn.microsoft.com/en-us/library/ie/hh772940. Retrieved 16 November 2012.
^ "pattern attribute | pattern property (Internet Explorer)". Microsoft. http://msdn.microsoft.com/en-us/library/ie/hh772941. Retrieved 16 November 2012.
^ "min attribute | min property (Internet Explorer)". Microsoft. http://msdn.microsoft.com/en-us/library/ie/hh772939. Retrieved 16 November 2012.
^ "max attribute | max property (Internet Explorer)". Microsoft. http://msdn.microsoft.com/en-us/library/ie/hh772938. Retrieved 16 November 2012.
^ "step property (Internet Explorer)". Microsoft. http://msdn.microsoft.com/en-us/library/ie/hh772944. Retrieved 16 November 2012.
^ "placeholder attribute | placeholder property (Internet Explorer)". Microsoft. http://msdn.microsoft.com/en-us/library/ie/hh772942. Retrieved 16 November 2012.
^ "autofocus attribute | autofocus property (Internet Explorer)". Microsoft. http://msdn.microsoft.com/en-us/library/ie/hh772924. Retrieved 16 November 2012.
^ "maxlength attribute |". Microsoft. http://msdn.microsoft.com/en-us/library/ie/ms534157. Retrieved 16 November 2012.
^ "noValidate property (Internet Explorer)". Microsoft. http://msdn.microsoft.com/en-us/library/ie/hh772929. Retrieved 16 November 2012.
^ "formTarget property (Internet Explorer)". Microsoft. http://msdn.microsoft.com/en-us/library/ie/hh772936. Retrieved 16 November 2012.
^ "formAction attribute | formAction property (Internet Explorer)". Microsoft. http://msdn.microsoft.com/en-us/library/ie/hh772932. Retrieved 16 November 2012.
^ "formMethod attribute | formMethod property (Internet Explorer)". Microsoft. http://msdn.microsoft.com/en-us/library/ie/hh772934. Retrieved 16 November 2012.
^ "formEnctype attribute | formEnctype property (Internet Explorer)". Microsoft. http://msdn.microsoft.com/en-us/library/ie/hh772933. Retrieved 16 November 2012.
^ "formNoValidate attribute | formNoValidate property (Internet Explorer)". Microsoft. http://msdn.microsoft.com/en-us/library/ie/hh772935. Retrieved 16 November 2012.
^ "datalist object (Internet Explorer)". Microsoft. http://msdn.microsoft.com/en-us/library/ie/hh772925. Retrieved 16 November 2012.
^ PRB: HTML Tag KEYGEN Not Supported in Internet Explorer, Microsoft, http://support.microsoft.com/kb/190282
^ "Progress element | Progress object (Internet Explorer)". Microsoft. http://msdn.microsoft.com/en-us/library/ie/hh772953. Retrieved 16 November 2012.
^ "input type=search object (Internet Explorer)". Microsoft. http://msdn.microsoft.com/en-us/library/ie/hh826024. Retrieved 16 November 2012.
^ "input type=tel element | input type=tel object (Internet Explorer)". Microsoft. http://msdn.microsoft.com/en-us/library/ie/hh773066. Retrieved 16 November 2012.
^ "input type=url element | input type=url object (Internet Explorer)". Microsoft. http://msdn.microsoft.com/en-us/library/ie/hh773067. Retrieved 16 November 2012.
^ "input type=email element | input type=email object (Internet Explorer)". Microsoft. http://msdn.microsoft.com/en-us/library/ie/hh773063. Retrieved 16 November 2012.
^ "input type=number element | input type=number object (Internet Explorer)". Microsoft. http://msdn.microsoft.com/en-us/library/ie/hh773064. Retrieved 16 November 2012.
^ "input type=range element | input type=range object (Internet Explorer)". Microsoft. http://msdn.microsoft.com/en-us/library/ie/hh773065. Retrieved 16 November 2012.
^ getElementsByClassName, Microsoft, http://ie.microsoft.com/testdrive/HTML5/80getElementsByClassName/Default.html
^ HTML5 History in IE10, Microsoft, http://blogs.msdn.com/b/ie/archive/2011/10/31/html5-history-in-ie10.aspx
^ HTML5 Parsing in IE10, Windows Internet Explorer Engineering Team, 2001-07-06, http://blogs.msdn.com/b/ie/archive/2011/07/06/html5-parsing-in-ie10.aspx
^ onhashchange Event, Microsoft, http://msdn.microsoft.com/en-us/library/cc288209%28VS.85%29.aspx
^ "track element | track object (Internet Explorer)". Microsoft. http://msdn.microsoft.com/en-us/library/hh772958. Retrieved 29 November 2012.
^ Resig, John (2008-03-06), JavaScript in Internet Explorer 8, http://ejohn.org/blog/javascript-in-internet-explorer-8/
^ IndexedDB Prototype Available for Internet Explorer, http://blogs.msdn.com/b/interoperability/archive/2010/12/21/indexeddb-prototype-available-for-internet-explorer.aspx
^ WebSockets in Windows Consumer Preview, IE Engineering Team, http://blogs.msdn.com/b/ie/archive/2012/03/19/websockets-in-windows-consumer-preview.aspx
^ Leithead, Travis (2011-07-02), Web Workers in IE10: Background JavaScript Makes Web Apps Faster, Microsoft, http://blogs.msdn.com/b/ie/archive/2011/07/01/web-workers-in-ie10-background-javascript-makes-web-apps-faster.aspx
^ Acting on Feedback: IE9 Release Candidate Available for Download, http://blogs.msdn.com/b/ie/archive/2011/02/10/acting-on-feedback-ie9-release-candidate-available-for-download.aspx
^ "Application Cache API ("AppCache") (Windows)". Microsoft. http://msdn.microsoft.com/en-us/library/ie/hh673545. Retrieved 17 November 2012.

Gecko references

Webkit references

Presto references

^ A call for video on the web - Opera <video> release on Labs, Opera, http://dev.opera.com/articles/view/a-call-for-video-on-the-web-opera-vid/
^ ^a ^b Opera Core Concerns - (re-)Introducing <video>, Opera, http://my.opera.com/core/blog/2009/12/31/re-introducing-video
^ Web specifications supported in Opera 9.5, Opera, http://www.opera.com/docs/specs/opera95/
^ canvas Support in Opera, Opera, http://www.opera.com/docs/specs/opera9/canvas/
^ Chavchanidze, George (2008-06-12), Opera 9.5 released, Opera, http://my.opera.com/mathml/blog/2008/06/12/opera-9-5-released
^ Implemented full support for the part of the HTML5 specification entitled "Parsing HTML documents"., Opera, http://www.opera.com/docs/specs/presto29/#m29-224
^ HTML5 elements, attributes, and APIs support in Opera Presto 2.8, Opera, http://www.opera.com/docs/specs/presto28/html5/#elements
^ ^a ^b ^c ^d Haavard (2010-06-14), HTML5, and then some, Opera, http://my.opera.com/desktopteam/blog/2010/06/14/html5-and-then-some
^ ^a ^b ^c ^d Kleinhout, Huib (2010-07-01), Opera 10.60 goes final, Opera, http://my.opera.com/desktopteam/blog/2010/07/01/opera-10-60-goes-final
^ HTML5 elements, attributes, and APIs support in Opera Presto 2.8, Opera, http://www.opera.com/docs/specs/presto28/html5
^ HTML5 elements, attributes, and APIs support in Opera Presto 2.8, Opera, http://www.opera.com/docs/specs/presto28/html5
^ HTML 5 Forms support in Opera Presto 2.2, Opera, http://www.opera.com/docs/specs/presto22/forms/
^ ^a ^b ^c ^d ^e Ødegaard, Ruarí (2010-12-06). "Extension improvements, updates to Core and some other nice fixes". Opera. http://my.opera.com/desktopteam/blog/2010/12/06/extension-improvements-updates-to-core-and-some-other-nice-fixes. Retrieved 2010-12-06.
^ HTML5 elements, attributes, and APIs support in Opera Presto 2.8, Opera, http://www.opera.com/docs/specs/presto28/html5
^ HTML5 elements, attributes, and APIs support in Opera Presto 2.8, Opera, http://www.opera.com/docs/specs/presto28/html5
^ HTML5 elements, attributes, and APIs support in Opera Presto 2.8, Opera, http://www.opera.com/docs/specs/presto28/html5
^ HTML5 elements, attributes, and APIs support in Opera Presto 2.8, Opera, http://www.opera.com/docs/specs/presto28/html5
^ HTML5 elements, attributes, and APIs support in Opera Presto 2.8, Opera, http://www.opera.com/docs/specs/presto28/html5
^ HTML5 elements, attributes, and APIs support in Opera Presto 2.8, Opera, http://www.opera.com/docs/specs/presto28/html5
^ ^a ^b Opera 11.60 changelog, 2011-12-06, http://www.opera.com/docs/changelogs/windows/1160/
^ Web specifications support in Opera Presto 2.10 - Drag and Drop, Opera, http://www.opera.com/docs/specs/presto2.10/
^ Introducing the HTML5 History API, Opera, http://dev.opera.com/articles/view/introducing-the-html5-history-api/
^ Opera 11.60 for Windows changelog, Opera, 2011-12-06, http://www.opera.com/docs/changelogs/windows/1160/
^ Haavard (2010-05-31), Opera 10.60 Alpha 1: Speed, eye-candy, and bug fixing, Opera, http://my.opera.com/desktopteam/blog/2010/05/31/opera-10-60-alpha-1
^ HTML5 elements, attributes, and APIs support in Opera Presto 2.8, Opera, http://www.opera.com/docs/specs/presto28/html5
^ Hunt, Lachlan (2008-05-22), Selectors API, Opera, http://my.opera.com/core/blog/selectors-api
^ ^a ^b Dixit, Shwetank (2009-12-16), Opera 10.5 Pre-Alpha build released: the new additions, Opera, http://my.opera.com/ODIN/blog/opera-10-5-pre-alpha-build-released-here-is-whats-new
^ W3C File API support in Opera Presto 2.8, Opera, http://www.opera.com/docs/specs/presto28/file/
^ Web specifications support in Opera Presto 2.10, Opera Software ASA, 2011-10-13, http://www.opera.com/docs/specs/presto2.10/#m210-261
^ Bersvendsen, Arve (2006-09-01), Event Streaming to Web Browsers, Opera, http://my.opera.com/WebApplications/blog/show.dml/438711
^ van Kesteren, Anne (2010-10-11). "The long journey of Server-Sent Events (EventSource)". Opera. http://my.opera.com/core/blog/eventsource. Retrieved 2010-10-11.
^ Pieters, Simon (2010-10-11). "WebSockets in Opera". Opera. http://my.opera.com/core/blog/websockets. Retrieved 2010-10-11.
^ van Kesteren, Anne (2010-12-08). "Disabling the WebSocket protocol". http://annevankesteren.nl/2010/12/websocket-protocol-vulnerability. Retrieved 2011-01-10.
^ "Web specifications support in Opera Presto 2.11". Opera Software ASA. http://www.opera.com/docs/specs/presto2.11/#m211-337. Retrieved 2012-07-23.
^ Nilsen, Petter (2010-02-05), Skin fixes, Unite, and then some, Opera, http://my.opera.com/desktopteam/blog/2010/02/05/skin-fixes-unite-and-then-some
^ Web specifications supported in Opera Presto 2.5, Opera, http://www.opera.com/docs/specs/presto25/

Other references

^ Studholme, Oli (2010-05-11), The ruby element and her hawt friends, rt and rp, HTML5 Doctor, http://html5doctor.com/ruby-rt-rp-element/
^ http://msdn.microsoft.com/en-us/library/ie/hh673546%28v=vs.85%29.aspx#Application_Cache_API_AppCache
^ W3C - Test results: HTML character encoding basics, 2010-04-12, http://www.w3.org/International/tests/tests-html-css/tests-character-encoding/results-html-encoding-basic
^ WHATWG Weekly: translate attribute and other changes to HTML, 2012-02-07, http://blog.whatwg.org/weekly-translate-attribute
^ Pilgrim, Mark (2009-03-06), The Road to HTML 5: contentEditable, http://blog.whatwg.org/the-road-to-html-5-contenteditable
^ Pilgrim, Mark (2009-03-04), The Road to HTML 5: spellchecking, http://blog.whatwg.org/the-road-to-html-5-spellchecking
^ "keygen", Mozilla Developer Center (Mozilla), https://developer.mozilla.org/En/HTML/Element/keygen, retrieved 2010-03-13
^ Koch, Peter-Paul, W3C DOM Compatibility - Core, QuirksMode, http://www.quirksmode.org/dom/w3c_core.html
^ Holzschlag, Molly (June 2009), A Selection of Supported Features in HTML5, http://molly.com/html5/html5-0709.html
^ "Is this HTML5?", HTML5 (including next generation additions still in development), WHATWG, 2010-05-04, http://www.whatwg.org/specs/web-apps/current-work/#is-this-html5?, retrieved 2010-05-04
^ main element - an HTML5 extension specification, W3C, 2012-12-17, http://www.w3.org/TR/html-main-element/
^ HTML Templates, W3C, 2013-02-14, http://www.w3.org/TR/html-templates/
^ Selectors API Level 1, W3C, http://dev.w3.org/2006/webapi/selectors-api/
^ Web Storage, W3C, http://dev.w3.org/html5/webstorage/
^ Indexed Database API, W3C, http://www.w3.org/TR/IndexedDB/
^ Web SQL Database, W3C, http://dev.w3.org/html5/webdatabase/
^ File API, W3C, 2010-10-26, http://www.w3.org/TR/FileAPI/
^ File API: Writer, W3C, 2010-10-26, http://www.w3.org/TR/file-writer-api/
^ File API: Directories and System, W3C, 2010-10-26, http://dev.w3.org/2009/dap/file-system/file-dir-sys.html
^ Media Capture API, W3C, http://dev.w3.org/2009/dap/camera/
^ Server-Sent Events, W3C, http://dev.w3.org/html5/eventsource/
^ The Web Sockets API, W3C, http://dev.w3.org/html5/websockets/
^ Web Workers, W3C, http://dev.w3.org/html5/workers/
^ Resig, John (2009-07-21), Computing with JavaScript Web Workers, http://ejohn.org/blog/web-workers/
^ Geolocation API Specification, W3C, http://dev.w3.org/geo/api/spec-source.html
^ 5.6 Offline Web applications — HTML5, W3C, http://dev.w3.org/html5/spec/offline.html#offline
^ Web Notifications, W3C, http://www.w3.org/TR/notifications/
^ Available only in Firefox Mobile as of Gecko 2.0, https://developer.mozilla.org/en/DOM/Displaying_notifications
^ 594543 - Implement Desktop Notifications, https://bugzilla.mozilla.org/show_bug.cgi?id=594543
^ There is a bug in Chrome but is working, http://code.google.com/p/chromium/issues/detail?id=34961

External links

HTML5 specification
Implementations in Web browsers – WHATWG wiki page tracking features implemented in various Web browsers.
HTML5 test
Can I use — comparison tables for HTML5 and CSS3

Layout engines

Actively developed layout engines	Amaya Gecko KHTML Prince Trident WebKit

Inactive layout engines	Boxely Gazelle GtkHTML HTMLayout iCab Mariner Presto Tasman Tkhtml

Comparison of layout engines	HTML non-standard HTML HTML5 media canvas XML XHTML 1.1 MathML SVG CSS ECMAScript DOM Graphics Typography

Comparison of layout engines (HTML5)

Contents