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use-app-events

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Create custom events and reactive variables in vanilla JavaScript and React.

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export type Listener<Type extends string> = { /** Event type the listener is waiting for. */ eventType: Type; /** Function to call on event. */ callback: (...args: any[]) => void | Promise<void>; /** Unique identifier of the context in which the listener was created. */ scopeKey?: string; /** * Unique identifier of the event group. * * Note: It is used if `listenForEvents` has been called with an array of event types. */ eventGroupId?: string; /** Boolean indicating whether the listener should be called only once if the event occurs. */ shouldBeCalledOnce?: boolean; /** Boolean indicating whether the listener has been called at least once. */ hasBeenCalled?: boolean; }; /** Event types used by the service. */ export type ServiceEventType<EventType extends string> = `${EventType}_INIT`; export type Extend<Source, Target> = Exclude<Source, keyof Target> & Target; export type CleanupFunction = () => void;