This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The NetworkInformation interface provides information about the connection a device is using to communicate with the network and provides a means for scripts to be notified if the connection type changes. The NetworkInformation interfaces cannot be instantiated. It is instead accessed through the connection property of the Navigator interface.

Note: This feature is available in Web Workers.


This interface also inherits properties of its parent, EventTarget.

NetworkInformation.downlink Read only
Returns the effective bandwidth estimate in megabits per second, rounded to the nearest multiple of 25 kilobits per seconds.
NetworkInformation.downlinkMax Read only
Returns the maximum downlink speed, in megabits per second (Mbps), for the underlying connection technology.
NetworkInformation.effectiveType Read only
Returns the effective type of the connection meaning one of 'slow-2g', '2g', '3g', or '4g'. This value is determined using a combination of recently observed round-trip time and downlink values.
NetworkInformation.rtt Read only
Returns the estimated effective round-trip time of the current connection, rounded to the nearest multiple of 25 milliseconds.
NetworkInformation.type Read only
Returns the type of connection a device is using to communicate with the network. It will be one of the following values:
  • bluetooth
  • cellular
  • ethernet
  • none
  • wifi
  • wimax
  • other
  • unknown

Event handlers

The event that's fired when connection information changes and the change is fired on this object.


This interface also inherits methods of its parent, EventTarget.


Specification Status Comment
Network Information API
The definition of 'NetworkInformation' in that specification.
Draft Initial definition

Browser compatibilityUpdate compatibility data on GitHub

Chrome Edge Firefox Internet Explorer Opera Safari
Basic support 61 No No No 48 No
Available in workers 61 No No ? 48 ?
downlink 61 No No ? 48 ?
downlinkMax 61 No No No 48 No
effectiveType 61 No No No 48 No
onchange 61 No No No 48 No
rtt 61 No No No 48 No
type 61 No No No 48 No
Android webview Chrome for Android Edge Mobile Firefox for Android Opera for Android iOS Safari Samsung Internet
Basic support 50 38 ? 31 37 No ?
Available in workers 50 38 ? 53 37 ? ?
downlink 50 38 ? ? 37 ? ?
downlinkMax 50 38 ? No 37 No ?
effectiveType 50 38 ? Yes 37 ? ?
onchange 50 38 ? No
On Firefox, the event handler property corresponding to the change event is ontypechange.
37 No ?
rtt 50 38 ? No 37 No ?
type 50 38 ? No 37 No ?

See also

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