export type Nullable<T> = T | Array<T> | null;
export interface LockState {
    lockedNum: number;
    lockedElements: HTMLElement[];
    unLockCallback: null | (() => void);
    /** Only add document listener once */
    documentListenerAdded: boolean;
    initialClientPos: {
        clientX: number;
        clientY: number;
    };
}
export interface BSLOptions {
    /**
     * optional, default: false
     *
     * Used to prevent mouse scroll events in iOS simulator.
     */
    setOverflowForIOS?: boolean;
    /**
     * optional, default: 'hidden'
     *
     * `clip` is suitable for adapting elements of `position: sticky` in high-version browsers (Chrome 90 +).
     */
    overflowType?: 'hidden' | 'clip';
    /**
     * optional, default: false
     *
     * Whether to use global `lockState` for every BSL. It's useful when your page have multiple BSL instances.
     */
    useGlobalLockState?: boolean;
    /**
     * optional, default: true
     *
     * Whether to add padding-right to the html element when lock body scroll on PC.
     */
    withPaddingRight?: boolean;
}
declare global {
    interface Window {
        __BSL_LOCK_STATE__?: LockState;
        __BSL_PREVENT_DEFAULT__?: (event: TouchEvent) => void;
    }
}