JSFiddle - React, Tailwind, and code Playground

by RomanFF

HTML

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Document</title>
</head>
<body>
<p>10</p>
<button class="btn">Обратный отсчет</button>
</body>
</html>

CSS

div{
  width: 100px;
  height: 100px;
  background-color: red;
  transition:all 1s ease 0s;
}
.lexa{
  display: none;
}