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.
Editor's Draft Initial definition

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 61[1] No support No support 48[1] No support
Available in workers 61[1] ? ? 48[1] No support
Feature Android Webview Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support 50 38 31.0 (31) moz[1] No support 37 No support
Available in workers 50 38 53.0 (53) No support 37 No support

[1] Excludes downlinkMax and type properties.

See also

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