/**
 * CustomScrollbar - attaches a rendered scrollbar (vertical and/or horizontal)
 * to any scrollable element. Overlay approach: native overflow:auto is kept for
 * scroll physics, the native scrollbar is hidden via CSS, and custom track/thumb
 * elements are synced on top. Append `trackY`/`trackX` to your DOM; `destroy()`
 * cleans up. Classes: `.ty-scrollbar-{track,thumb}-{y,x}` plus state classes
 * `.has-overflow`, `.dragging`, `.scrolling` (brief auto-hide after scroll).
 */
export interface CustomScrollbarOptions {
    vertical?: boolean;
    horizontal?: boolean;
    autoHideDelay?: number;
}
/**
 * Check if custom scrollbar is enabled globally.
 * Default: true (custom scrollbar on).
 * Set data-ty-scrollbar="native" on <html> to opt out.
 */
export declare function isCustomScrollbarEnabled(): boolean;
export declare class CustomScrollbar {
    private _scrollEl;
    private _vertical;
    private _horizontal;
    private _autoHideDelay;
    readonly trackY: HTMLElement | null;
    readonly thumbY: HTMLElement | null;
    readonly trackX: HTMLElement | null;
    readonly thumbX: HTMLElement | null;
    private _isDragging;
    private _dragAxis;
    private _dragStartPos;
    private _dragStartScroll;
    private _rafId;
    private _hideTimeout;
    private _resizeObserver;
    private _onScroll;
    private _onThumbYDown;
    private _onThumbXDown;
    private _onTrackYDown;
    private _onTrackXDown;
    private _onDragMove;
    private _onDragEnd;
    constructor(scrollEl: HTMLElement, options?: CustomScrollbarOptions);
    private _createTrack;
    private _createThumb;
    /** Force update thumb size and position */
    update(): void;
    /** Reset scroll position */
    scrollToTop(smooth?: boolean): void;
    scrollToBottom(smooth?: boolean): void;
    scrollToLeft(smooth?: boolean): void;
    scrollToRight(smooth?: boolean): void;
    /** Cleanup all listeners and observers */
    destroy(): void;
    private _handleScroll;
    private _updateVertical;
    private _updateHorizontal;
    private _updateThumbPositions;
    private _updateThumbY;
    private _updateThumbX;
    private _showScrollbars;
    private _handleThumbYDown;
    private _handleThumbXDown;
    private _handleDragMove;
    private _handleDragEnd;
    private _handleTrackYDown;
    private _handleTrackXDown;
}