Web/API/UIEvent/sourceCapabilities

This is an experimental technologyCheck the Browser compatibility table carefully before using this in production.

The UIEvent.sourceCapabilities read-only property returns an instance of the InputDeviceCapabilities interface which provides information about the physical device responsible for generating a touch event. If no input device was responsible for the event, it returns null.

When a single user interaction with an input device generates a series of different input events, the sourceCapabilities property for all of them will point to the same instance of InputDeviceCapabilities. For example, when a user lifts their finger off of a touchscreen, several UIEvents may be generated including touchend, mousedown, click, and focus. All of these events must have the same sourceCapabilities representing the touchscreen.

A device is considered "responsible" for an event only when that interaction is part of the abstraction provided by the web platform. For example, many user agents allow a window to be resized with a mouse or a keyboard, but this detail is not exposed to the web platform in any way, and so the sourceCapabilities of a resize event will typically be null.

Syntax

var iDC = event.sourceCapabilities

Value

An instance of InputDeviceCapabilities.

Specifications

Specification	Status	Comment
InputDeviceCapabilitiesThe definition of 'sourceCapabilities' in that specification.	Draft	Initial definition.

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
sourceCapabilities Experimental'	Chrome Full support 47	Edge Full support ≤79	Firefox ?	IE No support No	Opera Full support Yes	Safari ?	WebView Android Full support 47	Chrome Android Full support 47	Firefox Android ?	Opera Android Full support Yes	Safari iOS ?	Samsung Internet Android Full support 5.0

Legend

Full support  

Full support

No support  

No support

Compatibility unknown  

Compatibility unknown

Experimental. Expect behavior to change in the future.'

Experimental. Expect behavior to change in the future.

sourceCapabilities by Mozilla Contributors is licensed under CC-BY-SA 2.5.