import NightingaleElement from "@nightingale-elements/nightingale-new-core";
export declare class NightingaleScrollboxItem<TData> extends NightingaleElement {
    /** HTML content to be rendered when this item becomes visible (before running "onEnter" callback). Leave unset to keep existing content. */
    "content-visible"?: string;
    /** HTML content to be rendered when this item becomes hidden (before running "onExit" callback). Leave unset to keep existing content. */
    "content-hidden"?: string;
    /** Custom data associated with this item. */
    data?: TData;
    private scrollbox?;
    private currentState;
    private requiredState;
    private readonly queue;
    private readonly callbacks;
    connectedCallback(): void;
    disconnectedCallback(): void;
    /** Request changing item state to "new" and running "onRegister" callback. */
    register(): void;
    /** Request changing item state to undefined and running "onUnregister" callback. This item should not be used anymore. */
    unregister(): void;
    /** Request changing item state to "visible" and running "onEnter" callback. */
    enter(): void;
    /** Request changing item state to "hidden" and running "onExit" callback. */
    exit(): void;
    private setContent;
    /** Set or remove "onRegister" callback function. Also run this callback function if the item is already registered (i.e. in "new", "visible", or "hidden" state). */
    onRegister(callback: ((item: NightingaleScrollboxItem<TData>) => void | Promise<void>) | null | undefined): void;
    /** Set or remove "onEnter" callback function. Also run this callback function if the item is in "visible" state. */
    onEnter(callback: ((item: NightingaleScrollboxItem<TData>) => void | Promise<void>) | null | undefined): void;
    /** Set or remove "onExit" callback function. Also run this callback function if the item is in "hidden" state. */
    onExit(callback: ((item: NightingaleScrollboxItem<TData>) => void | Promise<void>) | null | undefined): void;
    /** Set or remove "onUnregister" callback function. */
    onUnregister(callback: ((item: NightingaleScrollboxItem<TData>) => void | Promise<void>) | null | undefined): void;
}
//# sourceMappingURL=nightingale-scrollbox-item.d.ts.map