리액트 카운터구현

function Count() {
  const [quantity, setQuantity] = useState(0);
  const onIncrease = () => {
    setQuantity((prevQuantity) => prevQuantity + 1);
  };
  const onDecrease = () => {
    setQuantity((prevQuantity) => prevQuantity - 1);
  };

  return (
    <button onClick={onDecrease}>-</button>
	<div className="quantity">{quantity}</div>
	<button onClick={onIncrease}>+</button>
  );
}

export default Count;