Do I need to use clearInterval() when a React component is unmounted?

Question

What's up guys, I'm new to React so i met this code

const KeywordCycler = () => {

  const [isIntervalActive, setIsIntervalActive] = useState(false);
  const [currentIndex, setCurrentIndex] = useState(0);
  const [keyword, setKeyword] = useState('');

  const keywords = ["word 1", "word 2", "word 3"];

  useEffect(() => {
    const intervalId = setInterval(() => {
      setCurrentIndex((prevIndex) => (prevIndex + 1) % keywords.length);
    }, 1500);

    setIsIntervalActive(true);

    // Clean up the interval when the component is unmounted
    return () => {
      clearInterval(intervalId);
      setIsIntervalActive(false);

    };
  }, []);

  useEffect(() => {
    setKeyword(keywords[currentIndex]);
  }, [currentIndex, keywords]);

  return <div id="keyword">
    {keyword}
    <h1>Interval Status: {isIntervalActive ? console.log('Active') : console.log('Inactive')}</h1>

  </div>;
};

function App() {
  const [showHome, setShowHome] = useState(true);


  const toggleHome = () => {

    return setShowHome(!showHome);
  }
  return (

    <>
      {showHome && <KeywordCycler />}
      <button onClick={toggleHome}>Toggle Home</button>
    </>

  );
}

The KeywordCycler component sets up an interval to cycle through an array of keywords and display one at a time. It uses state variables to track the interval status, current index, and displayed keyword. The interval starts when the component mounts and stops when it unmounts. The displayed keyword is updated based on the current index. The App component renders the KeywordCycler component conditionally and includes a button to toggle its visibility.

In this code, clicking the "Toggle Home" button causes the component to unmount, which stops the setInterval function due to the cleanup performed by clearInterval. However, when the clearInterval function is removed, the setInterval function still stops correctly when i click "Toggle Home", and no messages are logged to the console, so does that mean i don't have to use clearInterval in this case?