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.
注意： This attribute has not been formally standardized. It is specified in the Touch Events – Level 2 草案 specification and not in 触摸事件 推荐 . This attribute is not widely implemented.
var yRadius = touchItem.radiusY;
yRadius
The Y radius of the ellipse that most closely circumscribes the area of contact with the screen.
Touch.radiusX example includes an example of this property's usage.
| 规范 | 状态 | 注释 |
|---|---|---|
| Touch Events – Level 2 | 草案 | 非稳定版本。 |
| 桌面 | 移动 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
radiusY
|
Chrome 43 | Edge ≤79 | Firefox ? | IE No | Opera Yes | Safari No | WebView Android 43 | Chrome Android 43 | Firefox Android Yes | Opera Android Yes | Safari iOS Yes | Samsung Internet Android 4.0 |
完整支持
不支持
兼容性未知
实验。期望将来行为有所改变。