pop up your sidebar cart when click the cart icon on main menu

Hello, I follow your video: https://www.youtube.com/watch?v=XIrXpOc1EXI&t=284s “”Add AD/Class to open sidebar cart”” and want to do the same, that is, to automatically pop up your sidebar cart when clicking the cart icon on main menu, but, my problem I am meeting is when I enable the function of showing cart on main menu”, the default link will go to either checkout or shopping cart page. How can I solve this problem? Thanks!