/**
 * Convert an HTML string to a DOM element.
 *
 * Parses an HTML string using DOMParser and returns the first child element
 * from the body of the resulting document. This is useful for creating DOM
 * elements from HTML strings in a safe and efficient way.
 *
 * @param html - A valid HTML string to be converted to a DOM element
 * @returns The first child element from the parsed HTML, or undefined if no elements exist
 *
 * @throws {TypeError} When html parameter is not a string
 * @throws {Error} When the HTML string is invalid or results in no elements
 *
 * @example
 * ```typescript
 * // Create a simple paragraph element
 * const paragraph = domify('<p>Hello, World!</p>');
 * console.log(paragraph?.tagName); // 'P'
 * console.log(paragraph?.textContent); // 'Hello, World!'
 *
 * // Create a more complex element with attributes
 * const link = domify('<a href="https://example.com" class="btn">Click me</a>');
 * console.log(link?.getAttribute('href')); // 'https://example.com'
 * console.log(link?.className); // 'btn'
 *
 * // Handle multiple elements (only first is returned)
 * const firstDiv = domify('<div>First</div><div>Second</div>');
 * console.log(firstDiv?.textContent); // 'First'
 * ```
 *
 * @example
 * ```typescript
 * // Type checking example
 * const element = domify('<button type="submit">Submit</button>');
 * if (element instanceof HTMLButtonElement) {
 *   console.log(element.type); // 'submit'
 * }
 * ```
 *
 * @public
 */
export declare function domify(html: string): Element | undefined;