JSFiddle - React, Tailwind, and code Playground

HTML

<input type="checkbox" id="xxx" onclick="SetCard()" checked> xxx
<br>
<input type="checkbox" id="yyy" onclick="SetCard()"> yyy

JavaScript

function SetCard() {
    var xxx_val = document.getElementById('xxx').checked 
    var yyy_val = document.getElementById('yyy').checked
    if(xxx_val === true)
    {
        document.getElementById('yyy').checked = false; 
    }
    if(yyy_val === true)
    {
        document.getElementById('xxx').checked = false;        
    }      
}