Web/API/ProgressEvent/lengthComputable

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.

Syntax

flag = ProgressEvent.lengthComputable

Specifications

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

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
lengthComputable	Chrome Full support 50	Edge Full support 12	Firefox Full support 3.5	IE Full support Yes	Opera Full support 37	Safari Full support 3.1	WebView Android Full support 50	Chrome Android Full support 50	Firefox Android Full support 4	Opera Android Full support 37	Safari iOS Full support 2	Samsung Internet Android Full support 5.0

Legend

Full support  

Full support

See also

• The ProgressEvent interface it belongs to.

ProgressEvent.lengthComputable by Mozilla Contributors is licensed under CC-BY-SA 2.5.