How to make changes to HTML document permanent using Javascript?

Question

1. I have a simple like counter code, but the changes made disappear after the page is refreshed.

2. Why does this happen, should this be done using PHP ?

Answer 1

I suggest looking to cookies if you want to keep track of information across page reloads in a simple way. If you want the information to be available to anybody other than the user who created it, you'll likely need some form of server-side persistence such as a database.