JQuery implements simple drop-down menu

As a lightweight DOM framework, JQuery brings us a lot of conveniences. Here is how to use JQuery to implement a simple drop-down menu:

1. First, we quote the script library from Google:

2. Then We write a piece of HTML:

 菜单一 菜单二 
 子项一 子项二 子项三 
 菜单三 
 子项一 子项二 子项三 
  

3. Then define CSS for it

4.hover(over,out)

A method that simulates hover events (the mouse moves over an object and out of the object). This is a custom method that provides a "keep in it" state for frequently used tasks.

That’s it, implement a simple drop-down menu.

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