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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 property has no significant value.


flag = ProgressEvent.lengthComputable


Specification Status Comment
The definition of 'ProgressEvent.lengthComputable' in that specification.
Living Standard

Browser compatibility

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari
Basic support No support (Yes) 3.5 (1.9.1) No support No support No support
Feature Android Edge Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support No support (Yes) 1.0 (1.9.1) No support No support No support

See also

Document Tags and Contributors

 Contributors to this page: DomenicDenicola, abbycar, fscholz, Reachmeatshivam, teoli
 Last updated by: DomenicDenicola,