Visibility toggle?

What did you find difficult while building the project? My first approach was to create two HTML's, index and thanks... I was not able to cross the rating's result from index.html to thanks.html.
Finally I created both cards in the index.html file and using JS I controled the visibility with the obj.classList.toggle( ), and got the result.

Which areas of your code are you unsure of? My second approach, described above is correct? Is is possible manipulate DOM crossing files?

Do you have any questions about best practices? Above described.