import { LazyOptions, LazyBinding } from '../types/index.js';
export declare class LazyCore {
    private useNative;
    private rootMargin;
    private type?;
    private io?;
    constructor(options: LazyOptions);
    private init;
    bind(el: Element, binding: LazyBinding): void;
    update(el: Element, { oldValue, value, arg }: LazyBinding): void;
    unbind(el: Element): void;
    private setObserver;
}
export declare function getVueVersion(Vue: any): number;
export declare function setStyle(el: Element, type: 'bg' | 'bgset', value: string): void;
export declare function error(msg: string): void;