JSFiddle - React, Tailwind, and code Playground

HTML

<input type="checkbox" id="id_of_your_checkbox" />
<input type="button" id="id_of_your_button" value="OK" disabled/>

JavaScript

var $myButton = $('#id_of_your_button');

$('#id_of_your_checkbox').click(function() {
  if ($(this).is(':checked')) {
    $myButton.prop('disabled', false);

  } else {
    $myButton.prop('disabled', true);
  }
});