There is an adaptive menu, how to make 2 adaptive menus work on the site?

Question

css

There is such a menu codepen.io/docode/pen/QbbQwm (not made by me) The site has a menu below and above. And both should be adaptive. I copied the js code, but when you click on the bottom menu, the site will scroll up to the top menu. What is the correct way to create 2 menus using this code?

Answer 1

codepen.io/anon/pen/pjZpQY