This time I want to share a vertical accordion menu with a dark background based on CSS3. The implementation principle is similar to the previous one, but the menu display form is slightly different. When the accordion menu is expanded, the sub-menu will have a horizontal fly-in animation. effect.
This time we continue to bring you a CSS3-based vertical accordion menu. In addition to the automatic folding of menu items like other accordion menus, it also has a feature that it has a smooth fade-in and fade-out effect during folding and unfolding.