ProgressEvent.lengthComputable

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

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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

Specification
XMLHttpRequest Standard
# dom-progressevent-lengthcomputable

浏览器兼容性

BCD tables only load in the browser

See also