/**
 * Emit an event locally (via `eventEmitter`) and post it on a same-named BroadcastChannel
 * so subscribers in other same-origin tabs receive it too. Use this for events whose
 * effects should propagate across tabs — logout, login, profile switch, etc.
 */
export declare const broadcastEvent: (event: string, payload?: unknown) => void;
/**
 * Subscribe to cross-tab broadcasts of `event`. Returns an unsubscribe function. No-op on
 * environments without `BroadcastChannel` (older Node, very old browsers).
 */
export declare const subscribeToBroadcastEvent: (event: string, callback: (payload: unknown) => void) => (() => void);
//# sourceMappingURL=index.d.ts.map