I have tested the first menu that you linked, added the necessary files from the demo they provided and it works as expected. The second menu should work too, since as you mentioned, it is standart html, css and js. Can you provide some sample projects where you are trying to implement these menus, so that I can figure out what you are doing wrong?
I have also attached a working example project with the first menu. I am looking forward to your reply.
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