Presentation API

Non-standard
This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The following content of Presentation API is mainly quoted from W3C Working Draft dated as May 10th, 2016. The further modification will be done after the final specification is confirmed on TPAC 2016, which will be held at the end of September, 2016.

Presentation concepts and usage

The Presentation API is developed to effectively display web content through large scale presentation devices such as projectors and connected TVs. The relevant multimedia devices include wired displays, such as HDMI, DVI, or similar, and wireless technologies like Miracast, Chromecast, DLNA, or AirPlay.

Basically, a web page which uses PresentationRequest can be defined as a controller page. The content to be displayed in those devices is represented as separate pages. With the PresentationRequest, a controller page describes the location of the to-be-displayed content, then asks the browser to provide a presentation device to pass the content using PresentationRequest.start() and stops content passing with PresentationConnection.terminate().

Interfaces

Presentation: In controlling browsing context, the Presentation interface provides a mechanism to override the browser default behavior of launching presentation to external screen. In receiving browsing context, Presentation interface provides the access to the available presentation connections.
PresentationRequest: Being associated with a request, a PresentationRequest object is used to initiate or reconnect to a presentation made by a controlling browsing context.
PresentationAvailability: A PresentationAvailability object is associated with available presentation displays and represents the presentation display availability for a presentation request.
PresentationConnectionAvailableEvent: The PresentationConnectionAvailableEvent is fired on a PresentationRequest when a connection associated with the object is created.
PresentationConnection: Each presentation connection is represented by a PresentationConnection object.
PresentationConnectionClosedEvent: A PresentationConnectionClosedEvent is fired when a presentation connection enters a closed state.
PresentationReceiver: The PresentationReceiver allows a receiving browsing context to access the controlling browsing contexts and communicate with them.
PresentationConnectionList: PresentationConnectionList represents the collection of non-terminated presentation connections. It is also a monitor for the event of new available presentation connection.

Example

The Presentation API is not currently supported anywhere yet. We had planned to add examples once supporting builds are available later this year.

Specifications

Specification	Status	Comment
Presentation API	Editor's Draft	Initial definition.

Feature	Chrome	Firefox (Gecko)	Internet Explorer	Opera	Safari (WebKit)
Basic support	48.0	?	?	?	?

Feature	Android	Android Webview	Firefox Mobile (Gecko)	Firefox OS	IE Mobile	Opera Mobile	Safari Mobile	Chrome for Android
Basic support	No support	No support	?	?	?	?	?	48.0