/**
 * Selects all elements matching the specified CSS selector within the target element (or the entire document if no target is provided).
 *
 * @param selector - A string containing one or more comma-separated CSS selectors.
 * @param target - The HTML element or Document within which to search. If not provided, defaults to the entire document.
 * @returns A NodeList of found elements. Returns an empty NodeList if no elements match the selector.
 */
export declare function selectors<T extends NodeListOf<Element>>(selector: string, target?: HTMLElement | Document): T;
/**
 * Selects the first element matching the specified CSS selector within the target element (or the entire document if no target is provided).
 *
 * @param selector - A string containing a valid CSS selector.
 * @param target - The HTML element or Document within which to search. If not provided, defaults to the entire document.
 * @returns The first element found that matches the selector, or null if no elements match.
 */
export declare function selector<T extends HTMLElement>(selector: string, target?: HTMLElement | Document): T | null;