NetworkInformation: rtt property

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

See full compatibility

Note: This feature is available in Web Workers.

The rtt read-only property of the NetworkInformation interface returns the estimated effective round-trip time of the current connection, rounded to the nearest multiple of 25 milliseconds. This value is based on recently observed application-layer RTT measurements across recently active connections. It excludes connections made to a private address space. If no recent measurement data is available, the value is based on the properties of the underlying connection technology.

Value

A number.

Specifications

Specification
Network Information API # dom-networkinformation-rtt

Browser compatibility

	desktop					mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	WebView Android	WebView on iOS
`rtt`	Chrome – Full support Chrome 61 (Release date: 2017-09-05) footnote footnote The value is never greater than 3000 ms, as a non-standard anti-fingerprinting measure.	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote footnote The value is never greater than 3000 ms, as a non-standard anti-fingerprinting measure.	Firefox – No support Firefox footnote No support	Opera – Full support Opera 48 (Release date: 2017-09-27) footnote footnote The value is never greater than 3000 ms, as a non-standard anti-fingerprinting measure.	Safari – No support Safari footnote No support	Chrome Android – Full support Chrome Android 38 (Release date: 2014-10-08) footnote footnote The value is never greater than 3000 ms, as a non-standard anti-fingerprinting measure.	Firefox for Android – No support Firefox for Android footnote No support	Opera Android – Full support Opera Android 25 (Release date: 2014-10-16) footnote footnote The value is never greater than 3000 ms, as a non-standard anti-fingerprinting measure.	Safari on iOS – No support Safari on iOS footnote No support	Samsung Internet – Full support Samsung Internet 3 (Release date: 2015-04-10) footnote footnote The value is never greater than 3000 ms, as a non-standard anti-fingerprinting measure.	WebView Android – Full support WebView Android 50 (Release date: 2016-04-13) footnote footnote The value is never greater than 3000 ms, as a non-standard anti-fingerprinting measure.	WebView on iOS – No support WebView on iOS footnote No support

Tip: you can click/tap on a cell for more information.

Full support: Full support
No support: No support
: See implementation notes.

NetworkInformation: rtt property

Value

Specifications

Browser compatibility

Legend

See also