Function setBackgroundMessageHandler

setBackgroundMessageHandler(
messaging: Messaging,
handler: (message: RemoteMessage) => Promise<any>,
): void
Set a message handler function which is called when the app is in the background or terminated.
Parameters
- messaging: Messaging
- handler: (message: RemoteMessage) => Promise<any>
Returns void
Remarks
Event delivery uses the legacy native event proxy shared across RN Firebase modules (not yet migrated to Codegen TurboModule events). Behavior matches pre-v26 releases.
- Defined in index.ts:758