TypeScript: интеграция с React

1interface ButtonProps {
2  variant: 'primary' | 'secondary';
3  children: React.ReactNode;
4  onClick?: () => void;
5}
6
7const Button: React.FC<ButtonProps> = ({ variant, children, onClick }) => (
8  <button className={variant} onClick={onClick}>{children}</button>
9);

1function handleSubmit(e: React.FormEvent<HTMLFormElement>) {
2  e.preventDefault();
3}

1const [count, setCount] = useState<number>(0);
2const ref = useRef<HTMLDivElement>(null);