Note: This feature is available in Web Workers.

The NetworkInformation interface of the Network Information API 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 interface cannot be instantiated. It is instead accessed through the connection property of the Navigator interface or the WorkerNavigator interface.

EventTarget NetworkInformation

Instance properties

This interface also inherits properties of its parent, EventTarget.

Returns the effective bandwidth estimate in megabits per second, rounded to the nearest multiple of 25 kilobits per seconds.

NetworkInformation.downlinkMax Read only Experimental

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.saveData Read only

Returns true if the user has set a reduced data usage option on the user agent.

NetworkInformation.type Read only Experimental

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

Instance methods

This interface also inherits methods of its parent, EventTarget.



The event that's fired when connection information changes.


Network Information API
# networkinformation-interface

Browser compatibility

BCD tables only load in the browser

See also