ProgressEvent.lengthComputable

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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

规范 状态 备注
XMLHttpRequest
ProgressEvent.lengthComputable
Living Standard  

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