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• 句法
• 范例
• 规范
• 浏览器兼容性
• 相关话题

pointerId 只读特性在 PointerEvent interface is an identifier assigned to a given pointer event. The identifier is unique, being different from the identifiers of all other active pointer events. Since the value may be randomly generated, it is not guaranteed to convey any particular meaning.

句法

var id = pointerEvent.pointerId;
					

返回值

id

The pointer event's unique identifier number.

范例

The following code snippet compares a previously saved pointerId with the one of the pointerdown event that was just fired.

let id; // Let's assume that this is a previously saved pointerId
target.addEventListener('pointerdown', function(event) {
  // Compare previous event's ID that was cached
  // to current event's ID and handle accordingly
  if (id === event.pointerId) process_event(event);
}, false);
					

规范

规范	状态	注释
指针事件 – 2 级 The definition of 'pointerId' in that specification.	推荐	非稳定版本。
指针事件 The definition of 'pointerId' in that specification.	过时	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
pointerId	Chrome 55	Edge 12	Firefox 59 59 Disabled ). To change preferences in Firefox, visit	IE 10	Opera 42	Safari 13	WebView Android 55	Chrome Android 55	Firefox Android 41	Opera Android 42	Safari iOS 13	Samsung Internet Android 6.0

图例

完整支持

完整支持

用户必须明确启用此特征。

用户必须明确启用此特征。

元数据

• 最后修改： Jan 26, 2020

相关话题

1. 指针事件
2. PointerEvent
3. 构造函数

   1. PointerEvent()
4. 特性

   1. height
   2. isPrimary
   3. pointerId
   4. pointerType
   5. pressure
   6. tangentialPressure
   7. tiltX
   8. tiltY
   9. twist
   10. width
5. 方法

   1. getCoalescedEvents()
6. 继承：

   1. MouseEvent
   2. UIEvent
   3. 事件
7. Related pages for Pointer Events

   1. Element.ongotpointercapture
   2. Element.onlostpointercapture
   3. Element.releasePointerCapture()
   4. Element.setPointerCapture()
   5. GlobalEventHandlers.onpointercancel
   6. GlobalEventHandlers.onpointerdown
   7. GlobalEventHandlers.onpointerenter
   8. GlobalEventHandlers.onpointerleave
   9. GlobalEventHandlers.onpointermove
   10. GlobalEventHandlers.onpointerout
   11. GlobalEventHandlers.onpointerover
   12. GlobalEventHandlers.onpointerup
   13. Navigator.maxTouchPoints