JSFiddle - React, Tailwind, and code Playground

by Alen Doe

HTML

<div id="text" style="display:none">Text</div>
<button id="btn">Показать</button>

JavaScript

(function() {
   function switchText() {
     var btn = document.getElementById('btn'),
       text = document.getElementById('text');
     if (btn.innerHTML === 'Показать') {
       text.style.display = 'block';
       btn.innerHTML = 'Скрыть текст';
     } else {
       text.style.display = 'none';
       btn.innerHTML = 'Показать';
     }
   }
   document.getElementById('btn').addEventListener('click', switchText, false);
 })()