Asynchronous listeners: Data stored in a Firebase Realtime Database is retrieved by attaching an asynchronous listener to a database reference . The listener is triggered once for the initial state of the data and again anytime the data changes.
Asynchronous listeners: Data stored in a Firebase Realtime Database is retrieved by attaching an asynchronous listener to a database reference . The listener is triggered once for the initial state of the data and again anytime the data changes.