JavaScript implements two select drop-down box options to move left to the right for sample code sharing

This article mainly introduces the JavaScript implementation of two select drop-down box options shift left and right, js Implementation of drop-down box elements move each other, has a certain reference value, interested friends can refer to this article to introduce the JavaScript implementation of the two select drop-down box options shift left and right function, js Implementation of the drop-down box elements move each other, has a certain reference value, for more information, see

Today, I have nothing to do with js to write a small program that can move elements between two select drop-down boxes. I just started to learn javascript and there are still many optimizations.

Javascript code