How do I use clearInterval in JavaScript?

How do I use clearInterval in JavaScript?

You can use clearInterval to stop a timer that was set with setInterval. Just pass the interval ID to it.

Can you show me an example of how to use it?

Sure! First, you set an interval like this: let intervalId = setInterval(() => { console.log('Hello!'); }, 1000); Then, to stop it, you call clearInterval(intervalId);.

What happens if I don't call clearInterval?

If you don't call clearInterval, the interval will continue to run indefinitely, which can lead to performance issues.

Is there a way to clear all intervals at once?

JavaScript doesn't provide a built-in way to clear all intervals, but you can keep track of them and clear them individually.