UIEvent: sourceCapabilities property

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The sourceCapabilities read-only property of the UIEvent interface 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.

Value

An instance of InputDeviceCapabilities.

Specifications

Specification
Input Device Capabilities
# dom-uievent-sourcecapabilities

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
sourceCapabilities
Experimental

Legend

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Full support
Full support
No support
No support
Experimental. Expect behavior to change in the future.