JSFiddle - React, Tailwind, and code Playground

HTML

<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />
<input type="checkbox" />

JavaScript

$('input[type="checkbox"]').on('change', function () {
    var chcked = $('input:checked').length;
    $('input[type="checkbox"]:not(:checked)').prop('disabled', chcked == 3);
});