How to make the value and text in the cart change when the button is clicked?

Question

JavaScript

Hello!
Please tell me how to modify this script so that initially it says in the cart:
There are 0 items in the cart.
And then: There is 1 item in the cart, 2 items in the cart, and so on.
https://jsfiddle.net/mgt4ch0s/4/
Thanks!

Answer 1

https://www.google.com.ua/search?q=js+%F1%EA%EB%EE...
https://gist.github.com/realmyst/1262561