JSFiddle - React, Tailwind, and code Playground

HTML

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

JavaScript

function SetCard(e) {
    if (e && e.target) {
        if (e.target.id === 'xxx') {
            document.getElementById('yyy').checked = false;
        }
        else if (e.target.id === 'yyy') {
            document.getElementById('xxx').checked = false;
        }
    }
}