Prevent a device from going idle without refreshing HTML

Question

I have a simple website as seen here. It's a cross-platform counter program. It does what I want it to do which it good.

The only thing I want to improve is to prevent the device from going idle or locking when the page is open. I want to do this is a way that does not reset the number.

I've seen some methods but they involve refreshing, which will reset the number on the site. Is there a way to keep the device from sleeping using CSS or JavaScript?

-Thanks

Answer 1

It's not recommended, but yes, it is.

Here's another question for android, but that's right for you.

And here a simple Javascript library with what you are looking for.