/**
 * Check if an element has a given CSS class name.
 *
 * @example
 * const result = hasClass($element, 'some-class-to-check')
 *
 * @param {DOMElement} $element - A DOM element to check.
 * @param {String} className - A class to check the DOM element for.
 * @returns {Boolean} Returns true if element has class, false if not.
 */
export declare function hasClass($element: Element, className: string): boolean;
/**
 * Add a CSS class name to an element.
 *
 * @example
 * addClass($element, 'another-class')
 *
 * @param {DOMElement} $element - A DOM element to check.
 * @param {String} className - A class to add to the DOM element.
 */
export declare function addClass($element: Element, className: string): void;
/**
 * Remove a CSS class name from an element.
 *
 * @example
 * removeClass($element, 'another-class')
 *
 * @param {DOMElement} $element - A DOM element to remove the class name from.
 * @param {String} className - A class to remove from the DOM element.
 */
export declare function removeClass($element: Element, className: string): void;
/**
 * Toggle a CSS class name from an element.
 *
 * @example
 * toggleClass($element, 'another-class')
 *
 * @param {DOMElement} $element - A DOM element to toggle the class name on.
 * @param {String} className - A class to toggle off/on the DOM element.
 */
export declare function toggleClass($element: Element, className: string): boolean;