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• 句法
• 范例
• 规范
• 浏览器兼容性
• 相关话题

width 只读特性在 PointerEvent interface represents the width of the pointer's contact geometry along the x-axis, measured in CSS pixels. Depending on the source of the pointer device (such as a finger), for a given pointer, each event may produce a different value.

If the input hardware cannot report the contact geometry to the browser, the width defaults to 1 .

句法

var contactWidth = pointerEvent.width;
					

返回值

contactWidth

The width of the event's contact area (in CSS pixels).

范例

This example illustrates using the PointerEvent 接口的 width and height properties to calculate the contact area.

target.addEventListener("pointerdown", function(ev) {
   // Calculate the contact area
   var area = ev.width * ev.height;
 }, false);
					

规范

规范	状态	注释
指针事件 – 2 级 The definition of 'width' in that specification.	推荐	非稳定版本。
指针事件 The definition of 'width' 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
width	Chrome 55	Edge 12	Firefox 59 59 Disabled ). To change preferences in Firefox, visit	IE 11 11 部分支持 10 Returns values in screen pixels instead of CSS document pixels.	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

见实现注意事项。

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： 2020 年 1 月 22 日

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