Input: checkbox multi-choice box achieves the same effect as radio _ jquery

Checkbox is a multi-choice option. How can we change it into a single choice? The effect is the same as radio. This cainiao wrote a small program by himself. The code is very simple and has encountered a small problem recently, sometimes when we use single-choice radio, we will find that when we select one, we can no longer choose one, that is, there is no cancellation function after the selection, now I thought of the powerful checkbox, but he chose multiple options. How can he turn it into a single choice? The effect is the same as that of radio. This cainiao wrote a small program and the code is very simple, there are only four rows.

The Code is as follows:

The Code is as follows: