Comparison of layout engines (HTML5)

The following tables compare support of HTML5 differences from HTML4 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 without any add-ons, extensions or external programs.

Form elements and attributes

Many of these features can be emulated with third-party libraries.

\|	Trident	Gecko	WebKit	Presto
Attributes
`autocomplete`
`list`
`required`
`multiple`
`pattern`
`min`, `max`
`step`
`placeholder`
`form`
`autofocus`
`maxlength`
`novalidate`
Elements
`datalist`
`keygen`
`output`
Input types
`search`
`tel`
`url`
`email`
`datetime`	rowspan="6"	rowspan="6"	rowspan="6"	rowspan="6"
`date`
`month`
`week`
`time`
`datetime-local`
`number`
`range`
`color`
	Trident	Gecko	WebKit	Presto

Elements

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`
`nav`
`article`
`aside`
`hgroup`
`header`
`footer`
`time`
`mark`
`ProgresS`
`meter`
`ruby`, `rt`, `rp`
`figure`
`figcaption`
`embed`
`video`		{{#tag:ref\|`loop` attribute not supported, `poster` attribute supported as of 1.9.2.\|group=note}}		{{#tag:ref\|Beginning in 2007, several experimental builds have been released with Ogg Theora support. Full support for the video element will be included in Presto 2.5.\|group=note}}
`audio`		{{#tag:ref\|`loop` attribute not supported.\|group=note}}		{{#tag:ref\|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. Full support for the audio element with the Ogg Vorbis and WAV codecs will be included in Presto 2.5.\|group=note}}
`source`		{{#tag:ref\|`media` attribute not implemented.\|group=note}}
`canvas`
Inline MathML		{{#tag:ref\|Supported in XHTML and in HTML when the `html5.enable` preference is set.\|group=note\|name=moz-inline-xhtml}}		{{#tag:ref\|MathML for CSS, XHTML only\|group=note}}
Inline SVG
`details`
`summary`
`command`
`menu`
	Trident	Gecko	WebKit	Presto

Attributes

Element Specific

Attribute	Element	Trident	Gecko	WebKit	Presto
`manifest`	`html`
`sizes`	`link`
`charset`	`meta`
`scoped`	`style`
`async`	`script`				<!--Not in HTML5 anymore.
`ping`	`a`, `area`		{{#tag:ref\|Experimental implementation has been turned off by default in 1.9 due to specification changes late in the development cycle.\|group=note}}		-->
`reversed`	`ol`
`sandbox`	`iframe`
`seamless`	`iframe`
Attribute	Element	Trident	Gecko	WebKit	Presto

Global

\|	Trident	Gecko	WebKit	Presto
Datasets (`data-*`)
`contextmenu`
`hidden`
`contenteditable`
`spellcheck`
`draggable`
	Trident	Gecko	WebKit	Presto

APIs

\|	Trident	Gecko	WebKit	Presto
`getElementsByClassName`
`registerProtocolHandler`		{{#tag:ref\|Limited to the feed protocol in 1.8; fully supported in 1.9.\|group=note}}
`registerContentHandler`		{{#tag:ref\|Limited to feed MIME types in 1.8 and 1.9.\|group=note}}
Cross-document messaging
Drag-and-drop
`pushState()` and `replaceState()`
	Trident	Gecko	WebKit	Presto

Other features

\|	Trident	Gecko	WebKit	Presto
Microdata
Parsing HTML documents
`<a rel="noreferrer">`
`window.onhashchange`
`element.classList`
	Trident	Gecko	WebKit	Presto

Related specifications

\|	Trident	Gecko	WebKit	Presto
Selectors API
Web Storage		{{#tag:ref\|Fails when the key is an empty string. \|group=note}}
Web Database
Server-sent Events
Web Sockets			{{#tag:ref\|In Chromium. \|group=note}}
Web Workers
Geolocation API				{{#tag:ref\|Geolocation support was added in Presto 2.5, but is not enabled by default.\|group=note}}
	Trident	Gecko	WebKit	Presto

Trident references

Gecko references

Webkit references

Presto references

Other references

External links

HTML5 specification
Implementations in Web browsers – WHATWG wiki page tracking features implemented in various Web browsers.