javascript clear interval

1var myInterval = setInterval(function(){console.log("mmk")}, 2000);
2
3clearInterval(myInterval); //stop that interval

1var refreshIntervalId = setInterval(fname, 10000);
2
3/* later */
4clearInterval(refreshIntervalId);

1const delay = 2;
2const limit = 2;
3let i = 1;
4
5console.log('START!');
6const limitedInterval = setInterval(() => {
7  console.log(`message ${i}, appeared after ${delay * i++} seconds`);
8  
9  if (i > limit) {
10    clearInterval(limitedInterval);
11    console.log('interval cleared!');
12  }
13}, delay * 1000);

1const App = () => {
2  const [loading, setLoading] = React.useState(true);
3  React.useEffect(() => {
4    const interval = setInterval(() => {
5      setLoading(false);
6    }, 3000);
7    return () => clearInterval(interval);
8  }, []);
9  return (
10    <div className="App">{loading ? <h1>Loading</h1> : <h2>Counter</h2>}</div>
11  );
12}
13ReactDOM.render(<App />, document.getElementById("root"));