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 Ā 

Browser compatibility

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ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
lengthComputableChrome Full support 50Edge Full support 12Firefox Full support 3.5IE Full support YesOpera Full support 37Safari Full support 3.1WebView Android Full support 50Chrome Android Full support 50Firefox Android Full support 4Opera Android Full support 37Safari iOS Full support 2Samsung Internet Android Full support 5.0


Full support Ā 
Full support

See also