1. Web
  2. Web APIs
  3. Touch
  4. radiusY

Touch: radiusY property

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

The radiusY read-only property of the Touch interface returns the Y radius of the ellipse that most closely circumscribes the area of contact with the touch surface. The value is in CSS pixels of the same scale as Touch.screenX.

This value, in combination with Touch.radiusX and Touch.rotationAngle constructs an ellipse that approximates the size and shape of the area of contact between the user and the screen. This may be a large ellipse representing the contact between a fingertip and the screen or a small one representing the tip of a stylus, for example.

Value

A number.

Examples

The Touch.radiusX example includes an example of this property's usage.

Specifications

Specification
Touch Events
# dom-touch-radiusy

Browser compatibility

Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
radiusY
Chrome – No support
Chrome 22 – 46 (Release date: 2012-09-25)
prefix
footnote Removed in 47 and later
prefix Implemented with the vendor prefix: webkit
Chrome – Full support
Chrome 38 (Release date: 2014-10-07)
footnote Full support
Edge – Full support
Edge 79 (Release date: 2020-01-15)
footnote Full support
Firefox – No support
Firefox 18 – 23 (Release date: 2013-01-08)
footnote Removed in 24 and later
footnote Removed in bug 888304 due to web compatibility issues.
Firefox – Partial support
Firefox 52 (Release date: 2017-03-07)
footnote Partial support
footnote This interface is only exposed if a touch input device is detected.
Opera – No support
Opera 15 – 33 (Release date: 2013-07-02)
prefix
footnote Removed in 34 and later
prefix Implemented with the vendor prefix: webkit
Opera – Full support
Opera 25 (Release date: 2014-10-15)
footnote Full support
Safari – No support
Safari
footnote No support
Chrome Android – No support
Chrome Android 25 – 46 (Release date: 2013-02-27)
prefix
footnote Removed in 47 and later
prefix Implemented with the vendor prefix: webkit
Chrome Android – Full support
Chrome Android 38 (Release date: 2014-10-08)
footnote Full support
Firefox for Android – Full support
Firefox for Android 6 (Release date: 2011-08-16)
footnote Full support
Opera Android – No support
Opera Android 14 – 33 (Release date: 2013-05-21)
prefix
footnote Removed in 34 and later
prefix Implemented with the vendor prefix: webkit
Opera Android – Full support
Opera Android 25 (Release date: 2014-10-16)
footnote Full support
Safari on iOS – Full support
Safari on iOS 10 (Release date: 2016-09-13)
footnote Full support
Samsung Internet – No support
Samsung Internet 1.5 – 4.2 (Release date: 2013-09-25)
prefix
footnote Removed in 5 and later
prefix Implemented with the vendor prefix: webkit
Samsung Internet – Full support
Samsung Internet 3 (Release date: 2015-04-10)
footnote Full support
WebView Android – No support
WebView Android 4.4 – 46 (Release date: 2013-12-09)
prefix
footnote Removed in 47 and later
prefix Implemented with the vendor prefix: webkit
WebView Android – Full support
WebView Android 38 (Release date: 2014-10-08)
footnote Full support
WebView on iOS – Full support
WebView on iOS 10 (Release date: 2016-09-13)
footnote Full support

Tip: you can click/tap on a cell for more information.

Full support
Partial support
No support
Requires a vendor prefix or different name for use.
Has more compatibility info.

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