export declare type IResizeSubscriber = () => void;
export declare type ResizeCallback = (rect: DOMRect) => void | Promise<void>;
export interface IOnSizeChangedOptions {
    debounceMs: number;
}
/**
 * Determines whether the resize observer API is available.
 */
export declare const CAN_USE_RESIZE_OBSERVER: boolean;
/**
 * Invokes the given callback for all ResizeEntries that are triggered when the size of the target element changes.
 * @param $elem
 * @param cb
 * @param options
 */
export declare function onSizeChanged($elem: Element, cb: ResizeCallback, { debounceMs }?: Partial<IOnSizeChangedOptions>): IResizeSubscriber;