Jquery doesn't work

It doesn’t works in CodePen. I wondered if it has a link to activate it too. FreeCodeCamp doesn’t gives any link for jQuery, so you are welcome to reply to this topic if you have the link or a way to solve it.

You have to add the cdn link for it to work.

In codepen, you can open up the settings and add the link there.

https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js

It doesn’t works, is there a code to add in?