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• 句法
• 规范
• 浏览器兼容性
• 相关话题

这是 实验性技术
检查 浏览器兼容性表格 要小心谨慎在生产中使用这之前。

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 ，和 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.

句法

var iDC = event.sourceCapabilities
					

值

实例化的 InputDeviceCapabilities .

规范

规范	状态	注释
InputDeviceCapabilities The definition of 'sourceCapabilities' in that specification.	草案	初始定义。

浏览器兼容性

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. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
sourceCapabilities	Chrome 47	Edge ≤79	Firefox ?	IE ?	Opera Yes	Safari ?	WebView Android 47	Chrome Android 47	Firefox Android ?	Opera Android Yes	Safari iOS ?	Samsung Internet Android 5.0

图例

完整支持

完整支持

兼容性未知 ?

兼容性未知

实验。期望将来行为有所改变。

实验。期望将来行为有所改变。

元数据

• 最后修改： 2019 年 3 月 23 日

相关话题

1. UIEvent
2. 构造函数

   1. UIEvent()
3. 特性

   1. cancelBubble
   2. detail
   3. isChar
   4. layerX
   5. layerY
   6. pageX
   7. pageY
   8. sourceCapabilities
   9. view
4. 方法

   1. initUIEvent
5. 事件

   1. initUIEvent
6. 继承：

   1. 事件