1import { useState } from "react";2 3// Count clicks and celebrate every tenth one.4export function Counter({ step = 1 }: { step?: number }) {5  const [count, setCount] = useState(0);6  const party = count > 0 && count % 10 === 0;7 8  return (9    <button className="btn" onClick={() => setCount(count + step)}>10      {party ? "Party!" : "Clicked"} {count} times11    </button>12  );13}