Connect Your Application to the Emulator Suite

We already got a brief overview of the Firebase Emulator Suite and how to set it up. Now, let’s find out how to connect and run applications on the Emulator Suite.

To begin using any Firebase service emulator, we must first instrument our application to talk to the service emulator. This is done with the help of a function imported from the service’s subpackage. For example, to instrument our application to communicate with the Firebase Auth emulator, we use the connectAuthEmulator function imported from the firebase/auth subpackage, as demonstrated below. This function takes the instance of the Firebase Auth service as the first parameter and takes the URL where the emulator runs as the second parameter: