/**
 * Inserts text at the current cursor position in a textarea element.
 * If the browser supports execCommand, it will use that method.
 * Otherwise, it falls back to manual text insertion.
 *
 * @param tArea - The textarea element to insert text into
 * @param text - The text to insert at the current cursor position
 *
 * @example
 * ```typescript
 * const textarea = document.querySelector('textarea');
 * textAreaInsert(textarea, 'Hello world');
 * ```
 */
export declare function textAreaInsert(tArea: HTMLTextAreaElement | null | undefined, text: string): void;