How can I add a 'more' button in a corner with many items like many website?

Question

I want to add a 'more' button to top left or right corner. When clicked this button, a box will open by a side with many items. How can i make it by using javascript? Pls help.

Answer 1

Can you share your site's markup and CSS in the playground? It might give more context on what you are trying to achieve