/**
 * Return element's offset related to the document
 * @todo handle case when editor initialized in scrollable popup
 * @param el - element to compute offset
 */
export declare function offset(el: HTMLElement): {
    /**
     * Calculated top offset of the passed element
     */
    top: number;
    /**
     * Calculated left offset of the passed element
     */
    left: number;
    /**
     * Calculated right offset of the passed element
     */
    right: number;
    /**
     * Calculated bottom offset of the passed element
     */
    bottom: number;
};