ProgressEvent.lengthComputable

ProgressEvent.lengthComputable 只读属性是一个布尔Boolean (en-US) 标志，表示ProgressEvent 所关联的资源是否具有可以计算的长度。否则 ，ProgressEvent.total (en-US) 属性将是一个无意义的值。

语法

flag = ProgressEvent.lengthComputable

规范

规范 状态 备注
XMLHttpRequest
ProgressEvent.lengthComputable		 Living Standard  

浏览器兼容性

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help! (en-US)

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari
Basic support 未实现 (Yes) 3.5 (1.9.1) 未实现 未实现 未实现
Feature Android Edge Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support 未实现 (Yes) 1.0 (1.9.1) 未实现 未实现 未实现

See also