Summary

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.

Note: This attribute has not been formally standardized. It is specified in the Touch Events – Level 2 Draft specification and not in Touch Events Recommendation. This attribute is not widely implemented.

Syntax

var yRadius = touchItem.radiusY;

Return value

yRadius
The Y radius of the ellipse that most closely circumscribes the area of contact with the screen.

Example

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

Specifications

Specification Status Comment
Touch Events – Level 2 Draft Non-stable version.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic support
Experimental
Chrome Full support 43Edge ? Firefox ? IE ? Opera ? Safari ? WebView Android Full support 43Chrome Android Full support 43Edge Mobile ? Firefox Android ? Opera Android ? Safari iOS Full support YesSamsung Internet Android ?

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.

Document Tags and Contributors

Last updated by: fscholz,