const { useState } = React;

function GreatCounter() {
  const [count, setCount] = useState(0);
  return (
    <div>
      <p>Current counter value:</p>
      <h2>{count}</h2>
      <button onClick={() => setCount(count + 1)}>
       Plus 1
     </button>
      <button onClick={() => {}}>
       Minus 1
     </button>
      <p>Last button clicked:</p>
      <h2>????</h2>
   </div>
  );
}

ReactDOM.render(<GreatCounter/>, document.getElementById("root"));