JSFiddle - React, Tailwind, and code Playground

by hollanditkzn

HTML

<a href="#" id="openBlock">Открыть</a>
<div class="hello hidden" id="hello">Отображаемый блок</div>

CSS

.hello{
  
}
.hello.hidden{
  display: none;
}

JavaScript

document.getElementById('openBlock').onclick = () => {
	document.getElementById('hello').classList.toggle('hidden');
}
 window.onclick = () => {
  document.getElementById('hello').classList.remove('hidden');
};