References Web APIs ProgressEvent lengthComputable
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ProgressEvent: lengthComputable property

Note: This feature is available in Web Workers.

The ProgressEvent.lengthComputable read-only property is a boolean 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.

Value

A boolean.

Specifications

Browser compatibility

See also

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