Passing parameter from url to link url on page?

Question

HTML

Good afternoon!
There is a link to a site with a parameter like example.com/page?param=value and on this page there are buttons with links to other pages. How to pass them the values ​​of the parameter of the page from which the user navigates?

Answer 1

Parse the line before the transition, apparently. And substitute new parameters in the link. Through js it is window.location.