/**
 * Transitions an element from 0 to a detected height
 * Will return a Promise when no 'done' callback is provided
 * @type {(el: HTMLElement, done?: function) => void | Promise<void>}
 */
export const expand: (el: HTMLElement, done?: Function) => void | Promise<void>;
/**
 * Transitions an element from a detected height to 0
 * Will return a Promise when no 'done' callback is provided
 * @type {(el: HTMLElement, done?: function) => void | Promise<void>}
 */
export const collapse: (el: HTMLElement, done?: Function) => void | Promise<void>;