Comparison of browser engines (HTML support)

This article compares HTML support by several browser engines.
Support for the many new additions of the current HTML5 standard is in its own section after the items that preceded it in the history of HTML.

Prior to HTML5

Global structure elements

The global structure of the document.

Text elements

Elements that represent text.

List elements

Elements that represent lists of information.

Table elements

Elements that represent tabular information.

Link elements

s, one of the primary forces driving the success of the World Wide Web.

	Trident	Gecko	WebKit	KHTML	Presto
`a`	rowspan="3"	rowspan="3"	rowspan="3"	rowspan="3"	rowspan="3"
`link`	-	-	-	-	-
`base`	-	-	-	-	-

Multimedia elements

Multimedia features including images, applets, video clips, and other HTML documents.

Frame elements

Elements to present documents in multiple views, which may be independent windows or subwindows. Frame layout is only available in the frameset profiles. All frames are not available in XHTML 1.1.

Form elements

The user interface controls for interacting with the web server.

Presentational elements

Elements that specify presentational information. Although not all elements are deprecated, their use is discouraged in favor of stylesheets. Deprecated elements are not available in the strict profiles and XHTML 1.1.

Stylesheet elements

The ways to apply stylesheets to the document.

	Trident	Gecko	WebKit	KHTML	Presto
`<link rel="style" … />`		rowspan="2"	rowspan="2"	rowspan="2"	rowspan="2"
`style`		-	-	-	-

Script elements

Elements for embedding client-side script. See also DOM Events for a list of attributes used to attach an event handler to an element.

	Trident	Gecko	WebKit	KHTML	Presto
`script`		rowspan="2"	rowspan="2"	rowspan="2"	rowspan="2"
`noscript`		-	-	-	-

Language elements

Elements related to language information.

	Trident	Gecko	WebKit	KHTML	Presto
`bdo`

Generic attributes

Attributes that can be used in any elements.

Non-standard items

In the early years of the Web, the standards which today are used in most web browsers and web pages were mostly non-existent. Different browsers and HTML editors were being offered by competing vendors such as Netscape and Microsoft, who had competing ideas for how web sites should be constructed. These varying features resulted in web developers coding for specific web browsers, using elements which could often be recognized by only one browser.
These tables list browser engine support for non-standard HTML items.

Element	Function	Supported first by	Deprecated in HTML version	Alternative solution	Trident	Gecko	WebKit	KHTML	Presto
`applet`	Insert an applet	HotJava	4	`embed`, `object`				rowspan="6"
`basefont`	Sets font styles	Internet Explorer	4	CSS				rowspan="4"	-
`center`	Centers contents	Netscape	4	CSS	rowspan="3"	rowspan="3"	rowspan="3"	-	-
`dir`	Directory list	?	4	`ul`, `ol`	-	-	-	-	-
`font`	Applies font styles	Netscape	4	CSS	-	-	-	-	-
`isindex`	Adds a search field	?	4	`input type="search"`		rowspan="2"			-
`listing`	Displays preformatted text	IETF	2	`pre`, `samp`, `code`, CSS	rowspan="3"			rowspan="3"	-
`menu`	Menu list	?	4	`ul`, `ol`	rowspan="2"	rowspan="5"	rowspan="5"	-	-
`plaintext`	Designates that all HTML be ignored, and to display the page as is	?	3.2	The `text/plain` MIME type	-	-	-	-	-
`s`	Strike-through	?	4	`del`, CSS	rowspan="3"	rowspan="4"	rowspan="4"	-	-
`strike`	Strike-through	?	4	`del`, CSS	-	-	-	-	-
`u`	Underline	?	4	CSS	-	-	-	-	-
`xmp`	Similar to `pre` and `plaintext`, but ignores all HTML within and displays as is	?	2	`pre`, `samp`, `code`				-	-

Attribute	Element	Alternative solution	Trident	Gecko	WebKit	KHTML	Presto
`align`	`caption`, `div`, `fieldset`, `h1`, `h2`, `h3`, `h4`, `h5`, `h6`, `hr`, `img`, `input`, `legend`, `p`, `object`, `table`	CSS	rowspan="6"	rowspan="6"		rowspan="18"	rowspan="18"
`alink`	`body`	CSS		-	-	-	-
`background`	`body`	CSS	rowspan="2"	-	-	-	-
`bgcolor`	`body`, `table`, `tr`, `td`, `th`	CSS	-	-	-	-	-
`border`	`img`, `object`	CSS		-	-	-	-
`clear`	`br`	CSS	rowspan="2"	-	-	-	-
`compact`	`dl`, `ul`, `ol`	CSS			-	-	-
`color`	`basefont`, `font`	CSS	rowspan="11"			-	-
`height`	`td`, `th`	CSS	rowspan="2"	rowspan="10"	-	-	-
`hspace`	`img`, `object`	CSS	-	-	-	-	-
`language`	`script`	The `type` attribute		-	-	-	-
`link`	`body`	CSS	rowspan="7"	-	-	-	-
`noshade`	`hr`	CSS	-	-	-	-	-
`nowrap`	`td`, `th`	CSS	-	-	-	-	-
`size`	`basefont`, `font`, `hr`	CSS	-	-	-	-	-
`start`	`ol`	-	-	-	-	-	-
`text`	`body`	CSS	-	-	-	-	-
`type`	`li`, `ul`, `ol`	CSS	-	-	-	-	-
`version`	`html`	DTD
`vlink`	`body`	CSS	rowspan="3"	rowspan="3"	rowspan="3"	rowspan="3"	rowspan="3"
`width`	`hr`, `pre`, `td`, `th`	CSS	-	-	-	-	-
`vspace`	`img`, `object`	CSS	-	-	-	-	-

Tag	Function	Introduced by	Alternative solution	Trident	Gecko	WebKit	KHTML	Presto
`bgsound`	Used to add sound to the background of a website	Internet Explorer	`audio`
`blink`	Used to display a blinking text	Netscape	Javascript, CSS
`bq`	Used to display a blockquote	WebTV, HTML 3.0	`blockquote`
`comment`	Used to allow the addition of comments to HTML documents	Internet Explorer, WebTV	`<!--... -->`
`ilayer`	Inline layers	Netscape	`iframe`
`image`	Synonym of img	?	`img`
`layer`	Used to create multiple layers of text and images which lay on top of each other in a given order	Netscape	CSS, AJAX
`marquee`	Used to display a scrolling, marquee-like text.	Internet Explorer, WebTV	JavaScript, CSS3
`nobr`	Prevents any line breaks from occurring within the flow of a text	Netscape	CSS	rowspan="2"	rowspan="2"	rowspan="2"	rowspan="2"	rowspan="2"
`noembed`	Displays an alternative text for browsers which do not recognize the embed tag	Netscape	Child elements of object used as fallback	-	-	-	-	-
`spacer`	Adds whitespace in a layout	Netscape	CSS
`wbr`	Placed inside a nobr element to add a line break	Netscape	Unicode character zero-width space
`xml`	Includes XML data, either inline or from an URL, in an HTML page	Internet Explorer	AJAX, possibly XML namespaces

Attribute	Deprecated for	Function	Supported first by	Trident	Gecko	WebKit	KHTML	Presto
`bgproperties`	`body`	Determines whether background image scrolls with the background	Internet Explorer	rowspan="10"
`bordercolor`	`body`	Sets colors for 3-D table borders in the `table`, `td`, `th`, and `tr` elements	Internet Explorer					-
`bordercolordark`	`body`	Sets colors for 3-D table borders in the `table`, `td`, `th`, and `tr` elements	Internet Explorer	rowspan="2"	rowspan="2"	rowspan="2"	rowspan="2"	-
`bordercolorlight`	`body`	Sets colors for 3-D table borders in the `table`, `td`, `th`, and `tr` elements	Internet Explorer	-	-	-	-	-
`controls`	`img`	Uses the `img` element to place video or audio clips	Internet Explorer					-
`dynsrc`	`img`	Uses the `img` element to place video or audio clips	Internet Explorer					-
`event`	`script`	Defines function to call for an object.	Internet Explorer		?	?	?	-
`for`	`script`	Defines the object to bind a scripting event.	Internet Explorer		?	?	?	-
`frame`	`table`	Controls the display of the outer borders of a table in the table tag	Internet Explorer		?			-
`framespacing`	`frameset`	Sets the amount of space between frames	Internet Explorer	?	?			-
`leftmargin`	`body`	Sets the margin between the browser window and the contents of the page	Internet Explorer	rowspan="2"	?	?
`loop`	`img`	Uses the `img` element to place video or audio clips	Internet Explorer					-
`rightmargin`	`body`	Sets the margin between the browser window and the contents of the page	Internet Explorer	rowspan="3"	?	?
`start`	`img`	Uses the `img` element to place video or audio clips	Internet Explorer					-
`target`	`form`	Specifies a target window or frame for the output of a form	Internet Explorer		?			-
`valign`	`caption`	Sets vertical alignment of table caption	Internet Explorer		?	?

HTML5

	Trident	EdgeHTML	Gecko	WebKit	Presto
`section`	rowspan="7"	rowspan="7"	rowspan="7"	rowspan="7"	rowspan="7"
`nav`	-	-	-	-	-
`article`	-	-	-	-	-
`aside`	-	-	-	-	-
`hgroup`	-	-	-	-	-
`header`	-	-	-	-	-
`footer`	-	-	-	-	-
`ping`
`time`
`mark`
`ruby`, `rt`, `rp`
`dialog`
`figure`	rowspan="2"	rowspan="2"	rowspan="2"	rowspan="2"	rowspan="2"
`figcaption`	-	-	-	-	-
`embed`
`video`	rowspan="4"	rowspan="3"	rowspan="3"	rowspan="3"	rowspan="3"
`audio`	-	-	-	-	-
`source`	-	-	-	-	-
`canvas`					-
Inline MathML			rowspan="2"
Inline SVG					-
`details`	rowspan="5"	rowspan="5"	rowspan="2"		rowspan="3"
`summary`		-	-	-	-
`command`			-	-	-
`menu`				-	-
`bdi`				-	-
`data`
`picture`
	Trident	EdgeHTML	Gecko	WebKit	Presto

Element-specific attributes

Global attributes

Form elements and attributes

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

APIs

Other features

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.

	Trident	EdgeHTML	Gecko	WebKit	Presto
`<track>`			-	-	-
`<a ping>`					-

Related specifications

	Trident	EdgeHTML	Gecko	WebKit	Presto
`main` element
`template` element
Selectors API
Web Storage
Indexed Database API
Web SQL Database
File API
File API: Writer					rowspan="2"
File API: Directories and System	rowspan="3"	rowspan="3"			-
Media Capture API				-	-
Server-sent events				-	-
WebSocket
Web Workers
Geolocation API
Offline Web applications
Web Notifications
	Trident	EdgeHTML	Gecko	WebKit	Presto

Media functions

The HTML5 specification defines several tags which allow video and audio to be included natively and semantically in HTML markup.

Element attributes

Media elements allow some attributes to be set directly in the tag.

DOM attributes

Some attributes related to media elements are exposed in the DOM.

DOM events

Media elements introduce new events to handle conditions which apply only to those elements, such as pausing/resuming.

	Trident	Gecko	WebKit	Presto
`loadstart`	rowspan="22"	rowspan="2"	?	?
`progress`	-	-	?	?
`suspend`		-	?	?
`abort`	rowspan="3"	-	?	?
`error`	-	-	?	?
`emptied`	-	-	?	?
`stalled`		-	?	?
`play`	rowspan="5"	-	?	?
`pause`	-	-	?	?
`loadedmetadata`	-	-	?	?
`loadeddata`	-	-	?	?
`waiting`	-	-	?	?
`playing`		-	?	?
`canplay`	rowspan="9"	-	?	?
`canplaythrough`	-	-	?	?
`seeking`	-	-	?	?
`seeked`	-	-	?	?
`timeupdate`	-	-	?	?
`ended`	-	-	?	?
`ratechange`	-	-	?	?
`durationchange`	-	-	?	?
`volumechange`	-	-	?	?

Video format support

This table documents support for video codecs by the <video> element.

	Trident	edgeHTML	Gecko	WebKit	Presto
Ogg Theora
H.264
WebM VP8

Audio format support

This table documents support for audio codecs by the <audio> element.

	Trident	edgeHTML	Gecko	WebKit	Presto
Ogg Vorbis	rowspan="2"		rowspan="2"
WAV PCM		rowspan="3"		-	-
MP3	rowspan="2"			rowspan="2"	-
AAC			-	-	-
Speex	rowspan="1"
Opus

Canvas functions

The following tables compare support for the drawing APIs of the Canvas element, a feature of HTML5. These tables compare native support by web browsers, without any plugins, add-ons or ECMAScript workarounds.

	Trident	Gecko	WebKit	Presto
`getContext`	rowspan="2"
`toDataURL`				-

Supported contexts

Rendering Context 2D

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