JSFiddle - React, Tailwind, and code Playground

HTML

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

JavaScript

function clicked(evt) {
alert(document.getElementById('foo').checked)
  //  if (confirm(document.getElementById('foo').checked)) {
  //  	setTimeout(afterclick, 5000);
   // }
  //  evt.preventDefault();
}

function afterclick() {
	alert(document.getElementById('foo').checked)
}

document.getElementById('foo').addEventListener('click',clicked);