“Jak sprawić, by stan zniknął po pewnym czasie (React)” Kod odpowiedzi

Jak sprawić, by stan zniknął po pewnym czasie (React)

let timeoutId = null;

export function App(props) {

  const [updated, setUpdated] = useState("");

  useEffect(() => {
    // if there's a message in updated
    if(updated.length > 0) {
      //remove previous timeout if any
      if(timeoutId !== null) {
        clearTimeout(timeoutId);
      }

      // create a timeout to remove it
      timeoutId = setTimeout(() => setUpdated(""), 3000);
    }
    
    // cleanup
    return () => {
      if(timeoutId !== null) {
        clearTimeout(timeoutId);
      }
    }
  }, [updated])


  return (
    <div className='App'>
      <button onClick={() => setUpdated("You have successfully did something!")}> setUpdated("You have successfully did something!") </button>
      <hr />
      {updated}
    </div>
  );
}