Pricing Component with Toggle using JavaScript

I plan to add a link to my card form project later on, so that when the user selects any plan of their choice, they would be redirected to the credit card detail form to input and submit their card information.

I'd really appreciate it if someone also could show me how I could use the keypress (or keydown) event Listener so that when the 'enter' key is pressed, the toggle would work as well🙏.