type ExtractArgs<T extends object> = T[keyof T] extends (...args: infer A) => any ? A : any[];
type EventState<T extends object, Args extends unknown[] = ExtractArgs<T>> = T & {
    (key?: keyof T, fun?: T[keyof T]): EventState<T, Args>;
    (target?: Partial<T>): EventState<T, Args>;
};

interface ClipboardState {
    snapshot: [ClipboardState];
    clipboard: string;
    callback(): void;
    change(): void;
    mount(): void;
    clean(): void;
}
type ClipboardArg = Partial<ClipboardState> | ClipboardState['change'];

declare const clipboardEvent: () => EventState<ClipboardState>;

export { type ClipboardArg, type ClipboardState, clipboardEvent };