export type SheetState = "open" | "closed";
export interface SheetOptions {
    onChange?: (open: boolean, panel: HTMLElement) => void;
}
export declare class SheetManager {
    readonly panel: HTMLElement;
    private readonly toggles;
    private readonly options;
    private returnFocus;
    constructor(panelOrSelector: string | HTMLElement, options?: SheetOptions);
    isOpen(): boolean;
    open(): void;
    close(): void;
    toggle(): void;
    destroy(): void;
    static initAll(root?: ParentNode): SheetManager[];
    private setState;
    private sync;
    private overlays;
    private onToggleClick;
    private onToggleKeyDown;
    private onPanelKeyDown;
}
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