/**
 * This hook can be used to dynamically apply a single className to the
 * `document.documentElement` (`<html>`) using the `classList` API.
 *
 * @example Main Usage
 * ```tsx
 * function Example() {
 *   useHtmlClassName("my-class-name");
 *   return null;
 * }
 * ```
 *
 * @since 6.0.0
 */
export declare function useHtmlClassName(className: string): void;
