How does jQuery implement the vertical level-2 navigation menu?

How does jQuery implement the vertical level-2 navigation menu?

How does jQuery implement the vertical level-2 navigation menu:
There are countless levels of navigation menus in the web design, including horizontal navigation menus and vertical navigation menus. In my personal impression, it seems that there are many tutorials on implementing horizontal navigation, so here we will separately introduce how to use jQuery to implement vertical navigation menus. Here we will only introduce how to implement this function, you can modify the design for the beauty of the effect. The following describes how to achieve this effect:
The static code is as follows:

<! DOCTYPE html> 
The above code is the code. In this case, the level-2 menu is hidden. Note that the ul of the level-2 menu is nested in the li element to facilitate jQuery code processing. For example, when the mouse pointer leaves the nearby li, the level-2 menu can be hidden. Otherwise, the level-2 menu cannot be selected once the mouse pointer is set to li of the level-1 menu. Add jQuery code for static code:
<! DOCTYPE html> 
The above code achieves the desired effect, which is not too beautiful, but the framework and method are already available and can be modified as needed.
Original address: http://www.51texiao.cn/jqueryjiaocheng/2015/0427/242.html