/// <reference types="resize-observer-browser" />
/**
 * Simple polifill of ResizeObserver for testing
 */
declare class ResizeObserver {
    private callback;
    elements: Set<Element>;
    constructor(callback: ResizeObserverCallback);
    onWindowResize(): void;
    observe(element: Element): void;
    unobserve(element: Element): void;
    disconnect(): void;
}
export default ResizeObserver;