在此页

• 句法
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

ProgressEvent.lengthComputable read-only property is a 布尔 flag indicating if the resource concerned by the ProgressEvent has a length that can be calculated. If not, the ProgressEvent.total property has no significant value.

句法

flag = ProgressEvent.lengthComputable
					

规范

规范	状态	注释
XMLHttpRequest The definition of 'ProgressEvent.lengthComputable' in that specification.	实时标准

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
lengthComputable	Chrome 50	Edge 12	Firefox 3.5	IE Yes	Opera 37	Safari 3.1	WebView Android 50	Chrome Android 50	Firefox Android 4	Opera Android 37	Safari iOS 2	Samsung Internet Android 5.0

图例

完整支持

完整支持

另请参阅

• ProgressEvent interface it belongs to.

元数据

• 最后修改： 2019 年 3 月 23 日

相关话题

1. ProgressEvent
2. 构造函数

   1. ProgressEvent()
3. 特性

   1. lengthComputable
   2. loaded
   3. total
4. 方法

   1. initProgressEvent()
5. 继承：

   1. 事件
6. DOM 事件相关页面

   1. CompositionEvent
   2. 事件
   3. EventListener
   4. EventTarget
   5. FocusEvent
   6. InputEvent
   7. KeyboardEvent
   8. MouseEvent
   9. MouseScrollEvent
   10. MouseWheelEvent
   11. MutationEvent
   12. UIEvent
   13. WheelEvent