JSFiddle - React, Tailwind, and code Playground

HTML

<ul class=submenu>
    <li><label for=toggle><input id=toggle type=checkbox checked>Show</label></li>
</ul>

JavaScript

document.querySelector('#toggle').addEventListener('change',function(){
    if(this.checked)
      console.log('toggle: Show');
    else
      console.log('toggle: Hide');
});