This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
WorkerNavigator.connection read-only property returns a
NetworkInformation object containing information about the system's connection, such as the current bandwidth of the user's device or whether the connection is metered. This could be used to select high definition content or low definition content based on the user's connection.
connectionInfo = self.navigator.connection
|Network Information API
The definition of 'Navigator.connection' in that specification.