Use Javascript to select drop-down menus to move and sort each other _ jquery

This article describes how to use js to implement the pull-down menu to move each other and sort menus. The code is easy to understand and has reference value, for more information about how to use the js drop-down menu, you can choose to move each other and sort the menus. The code is easy to understand and has reference value, for more information, see this section.

The Code is as follows:

Use Javascript to select drop-down menus to move and sort each other
 
Select one or more items and click add or remove (shift or ctrl to select multiple items), or double-click the selected item to add or remove them.