HTML 5.1 is the New Web Standard
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http://www.internetnews.com/blog/skerner/html-5.1-now-an-official-web-standard.html
HTML 5.1 replaces HTML 5 as the current standard markup language for the web.
New things in HTML 5.1 are:
- The picture and srcset attributes allow responsive image selection.
- The details andsummary elements enable authors to provide extended information that users can choose whether to read.
- The menuitem and type="context" attribute value enable authors to add functionality to the browser’s context menu.
- The requestAnimationFrame API allows for more efficient animation.
- enqueueJob and nextJob help explain Promise resolution in terms of microtasks.
- The rev attribute for links, primarily to support RDFa (previously defined in HTML 4).
- HTMLMediaElement and srcObject objects.
- Enable cross-origin track and EventSource and cross-origin content for ImageBitmap in canvas.
- event-source-error, event-track-error and event-track-load events for media fetching.
- onrejectionhandled and onunhandledrejection and APIs for tracking promise rejection.
- HTMLTableCaptionElement, HTMLTableSectionElement, HTMLTableRowElement, for HTML table elements.
- history.scrollRestoration to control where a users' view is directed when navigating through their history.
- IDL [SameObject], for some objects that return collections.
- Add "noopener" to rel and window to allow for browsing contexts to be separated.
- nonce attribute on script and style to support the use of Content Security Policy.
