/**
 * TyScrollContainer Web Component
 *
 * A scroll container with shadow indicators and an optional custom-rendered scrollbar.
 * Uses the CustomScrollbar utility internally.
 *
 * @example Custom scrollbar
 * ```html
 * <ty-scroll-container max-height="300px" custom-scrollbar>
 *   <div>Long content...</div>
 * </ty-scroll-container>
 * ```
 */
export declare class TyScrollContainer extends HTMLElement {
    private _scrollWrapper;
    private _shadowTop;
    private _shadowBottom;
    private _shadowLeft;
    private _shadowRight;
    private _scrollbar;
    private _resizeObserver;
    private _contentObserver;
    private _rafId;
    private _nearStartFired;
    private _nearEndFired;
    static get observedAttributes(): string[];
    get shadow(): boolean;
    set shadow(value: boolean);
    get maxHeight(): string | null;
    set maxHeight(value: string | null);
    get hideScrollbar(): boolean;
    set hideScrollbar(value: boolean);
    get customScrollbar(): boolean;
    set customScrollbar(value: boolean);
    get overflowX(): boolean;
    set overflowX(value: boolean);
    /** Distance (px) from an edge at which nearstart/nearend fire. Default 100. */
    get nearEdgeThreshold(): number;
    set nearEdgeThreshold(value: number | null);
    /** Preserve visual position when content is added above the viewport
     *  (e.g. prepending older messages in a chat). Opt-in. */
    get scrollAnchoring(): boolean;
    set scrollAnchoring(value: boolean);
    constructor();
    connectedCallback(): void;
    disconnectedCallback(): void;
    attributeChangedCallback(name: string, oldValue: string | null, newValue: string | null): void;
    private _setupAnchoring;
    private _teardownAnchoring;
    private _setupScrollbar;
    private _destroyScrollbar;
    private _updateMaxHeight;
    private _onScroll;
    private _onSlotChange;
    private _updateShadowState;
    /** Edge-trigger one near-edge event; returns the new "fired" state. */
    private _maybeEmitEdge;
    updateShadows(): void;
    scrollToTop(smooth?: boolean): void;
    scrollToBottom(smooth?: boolean): void;
    scrollToLeft(smooth?: boolean): void;
    scrollToRight(smooth?: boolean): void;
    /** Scroll a slotted descendant (element or CSS selector) into view. */
    scrollToElement(target: Element | string, smooth?: boolean): void;
    get scrollElement(): HTMLElement | null;
}
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