export function hidden(elem: any): boolean;
export function visible(elem: any): boolean;
export function closest(start: any, selector: any, context: any): any;
export function hide(elem: any): void;
export function show(elem: any): void;
export function capitalize(word: any): any;
export function setData(elem: any, key: any, value: any): void;
export function getData(elem: any, key: any): any;
export function insertAfter(new_elem: any, reference_element: any): void;