ProgressEvent.lengthComputable - Web API 接口参考 编辑

ProgressEvent.lengthComputable 只读属性是一个布尔Boolean 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 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!

• Desktop
• Mobile

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

• The ProgressEvent interface it belongs to.