import * as React from 'react';
import { StoreComponent } from '../services/store';
type NodeRef = Element | null;
interface Props {
    /**
     * children must be a function waiting for a ref callback
     * to give to the children element
     */
    children(ref: (node: NodeRef) => void): React.ReactNode;
}
/**
 * Observe visibility of a children component
 */
export declare class Visibility extends StoreComponent<Props> {
    private observer?;
    private eventTimeout;
    private triggered;
    private childrenRef?;
    render(): React.ReactNode;
    componentWillUnmount(): void;
    /**
     * Triggered each times the ref changes
     * @param ref Ref to the children
     */
    private onChildrenRef;
    private handleIntersection;
    private visibilityChange;
}
export {};