How to Implement the infinitely-level select linkage menu _ javascript skill in javascript

This article mainly introduces the methods and examples for implementing the infinite link menu in javascript. The idea is very good. It is very easy for anyone who needs it to refer to the code below, here, we recommend the implementation of this code, which is unique.

Code:

The Code is as follows:

Selects

Level 2 Linkage

Level 3 linkage

Level 4 linkage

5-level linkage