/**
 * Checks if the given element is a valid HTML element.
 *
 * @param ele - The element to check.
 * @returns Returns `true` if the element is a valid HTML element, otherwise `false`.
 *
 * @example
 * ```typescript
 * const div = document.createElement('div');
 * console.log(isElement(div)); // true
 *
 * const textNode = document.createTextNode('Hello');
 * console.log(isElement(textNode)); // false
 * ```
 */
export declare const isElement: (ele: HTMLElement) => boolean;
/**
 * Selects a single HTML element based on the provided CSS selector.
 *
 * @param selectors - A string containing one or more CSS selectors to match.
 * @returns The first HTML element that matches the specified selector, or `null` if no matches are found.
 *
 * @example
 * ```typescript
 * const header = el('header');
 * if (header) console.log('Header element found:', header);
 * ```
 */
export declare const el: (selectors: string) => HTMLElement | null;
/**
 * Selects all HTML elements that match the provided CSS selector.
 *
 * @param selectors - A string containing one or more CSS selectors to match.
 * @returns A NodeList of all HTML elements that match the specified selector.
 *
 * @example
 * ```typescript
 * const buttons = els('button');
 * buttons.forEach(button => {
 *   console.log('Button element:', button);
 * });
 * ```
 */
export declare function els(selectors: string): NodeListOf<HTMLElement>;