You can run some codes on interval using setInterval function in JavaScript. It accepts a function and a time interval in milliseconds. It returns a unique id which you can use to clear the interval using clearInterval function.

const intervalId = setInterval(() => {
  console.log('Hello World');
}, 1000);
 
// Output:
// Hello World
// Hello World

In the above code, the setInterval function runs the callback function every 1000 milliseconds (1 second) and prints Hello World to the console. It returns a unique id which you can use to clear the interval using clearInterval function.

clearInterval(intervalId);