Function beforeAuthStateChanged

beforeAuthStateChanged(
    auth: Auth,
    callback: (user: User | null) => void | Promise<void>,
    onAbort?: () => void,
): Unsubscribe
Registers a callback to run before an auth state change is committed.
Parameters
- auth: Auth
- callback: (user: User | null) => void | Promise<void>
- OptionalonAbort: () => void
Returns Unsubscribe
An unsubscribe function.
- Defined in auth/lib/modular.ts:344