HTML 5.1

Changes

This section summarises changes between Public Working Drafts.

Changes since the 12 April 2016 Public Working Draft.

Changes to match implementation or reflect lack of it

Removed seamless attribute on iframe

Removed table sorting

Clarify that respecting user preferences for track selection is valid

Allow figcaption anywhere within a figure (not just first or last)

Remove special handling of isindex in form submission

Normative reference changes

Move from WCAG 1.0 to WCAG 2.0

Changes between the 12 April 2016 Public Working Draft and the 10 March 2016 Public Working Draft.

accesskey attribute only takes a single character

This is to match implementation in browsers better.

Add a callout to detach a media object in the media element load algorithm

This is to synchronise with MSE.

Remove microdata

There is a http://www.w3.org/TR/2013/NOTE-microdata-20131029/W3C Note describing Microdata as an extension.

Note that the attributes may be added back, referring to a Recommendation-track version of the extension, since there is a substantial amount of implementation.

Changes between the 10 March 2016 Public Working Draft and the 10 October 2015 Public Working Draft.

Full details of all changes since 12 January 2016 are available from the commit log of the w3c/html github repository. Note that a large number of changes made between 10 October and 12 January were copied direct from the whatwg/html repository.

Removed because implementation is not consistent and the idea didn’t make sense

form attribute on label element.

Removed for lack of implementation and to potentially improve before re-adding

accessKeyLabel IDL attribute.

Removed for lack of implementation

Blank alt on area elements with duplicate href attributes is no longer conformant.

Browsers don’t know about the user’s keyboard

Storage Mutex

navigator.yieldForStorageUpdates()

hreflang andtype attributes on area links

document.cssElementMap and DOMElementMap interface

document.commands IDL

master commands concept in menuitem

Command API and related concepts

Focus navigation fixed

When navigating internally, the next search for a link etc starts from where the navigation moved to - no longer optionally.

main refers to the body

As opposed to be allowed multiple times in the page, for other elements

More ways p can be automatigically closed

redefine "fully active" for a document

Require that a document has its own browsing context to be fully active

change currentSrc for images which don’t resolve

From the absolute URL to the URL given to the resolver

a is non-interactive if it has no href attribute

Fix Collections

HTMLFormControlsCollection not used for collections of fieldset elements

Instead fieldset makes an HTMLCollection

namedItem is an HTMLCollection not HTMLOptionsCollection

Supported tokens

Define supported tokens for link types and dropzone as those that have an impact on processing

add supported tokens for rel

Allow more cross-origin…

Enable cross-origin track and EventSource

Allow cross-origin content for ImageBitmap in canvas

let frameElement return null

Transferable objects can go to different domains

Make content of time consistent

There were contradictory requirements, now it is phrasing content, or text

Integration with the ES job queue

Defining EnqueueJob() and NextJob in a monkeypatch to ECMAScript.

Add missing events

Events and APIs for tracking promise rejection

event-source-error error for media fetching

event-track-error and event-track-load

Make navigator.javaEnabled() a method

Table cleanups

Add specific types for HTML table elements

.tFoot an .createTFoot() always insert at the end

Disallow tfoot before tbody

Clear autoplay flag once autoplaying

Otherwise odd things happened if the network changed

Cleaning up toBlob in canvas

Make the toBlob() callback non-nullable

Rename fileCallback to blobcallback

CSP hooks

Add hooks for property on global object

for inline events, styles

inline elements

update specification links

Flip modes (remote/local) in loading media resources

make origin on HTMLHyperlinkElementUtils and Location readonly

meta refresh parsing

Match Gecko better

make ; optional

Clean up SVG in HTML

describe the flavour of SVG used in browsers

Make SVG title first child not last

Scroll restoration

Add scroll restoration preferences to history traversal

Clarify manual scrolling restoration

Take account of srclang when rendering track

Windows without browsing context

window.open() can return null

Add "noopener" to rel and window

Move HTTPS state from window to document

Drop some IDL attributes

[Exposed=Window] for HTMLHyperLinkElementUtils

[Exposed=Window, Worker] for DOMStringMap

IDL Date

Add IDL [SameObject] for some objects that return collections

Make script IDL attributes reflect

Remove "no exception" step from HAVE_METADATA

Fix mismatched HTMLMediaElement currentTime exception

If there is a current media controller it can still throw…

setInterval() timers clear too

Cleanup Fullscreen

rename menu type="popup" as menu type="context"

Support width="0"

For img and related elements, but not table cells

A description of substantial changes between the HTML 5.0 Recommendation of 2014 and the HTML 5.1 draft as it was in August 2015 is available as part of a separate document, that is no longer maintained.