Remaining Characters left count and limit input

I saw an old locked post on this but wanted to revisit this as it was about 12 years old.

I would like to set a limit dynamically on how many characters can be entered into a textarea.

I would also like a countdown so the user know how many characters they have entered and how many are left.

I am starting to see some php tools that do this automatically as far as the remaining character count so wishing it could be something that's eventually built into PHPR.

In the meantime, if there is some JS code or something that will do it, I'm okay with that.

Thanks
Alan