JSFiddle - React, Tailwind, and code Playground

HTML

<input type="checkbox" id="CB">

JavaScript

var $CB = $('#CB');

if (localStorage.getItem('CB')) {
  $CB.prop('checked', localStorage.getItem('CB') == 'true');
}

$CB.on('change', function() {
  localStorage.setItem('CB', $CB.prop('checked'));
  location.reload();
});