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">
<button>
Button
</button>

CSS

button:disabled {
  opacity: .3;
}

JavaScript

$('input[type=checkbox]').change(function(){
	var count = $('input[type=checkbox]:checked').length;
	$('button').prop('disabled', count == 0);
});