I have made a custom dropdown menu for my desktop and tablet sizes and it basically works perfectly. However, I noticed that the menu will only open to the same size it was initially opened when you first view the page. So if I open the menu on full screen and then resize my browser to a smaller size, the dropdown menu will be cut off when I try and open it again.
And the opposite is true as well, if I open on a smaller size and then resize the browser to fullsceen, the dropdown menu will now only open to the smaller size when it was first opened.