HTML редактор

<!doctype html>
<html lang="ru">

<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Transition Events - Example 02</title>
  <style>
    *,
    *::before,
    *::after {
      box-sizing: border-box;
    }

body {
      margin: 0;
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
      font-size: 1rem;
      font-weight: 400;
      line-height: 1.5;
      color: #212529;
      background-color: #fff;
      -webkit-text-size-adjust: 100%;
      -webkit-tap-highlight-color: transparent;
    }

.container {
      width: 400px;
      margin-right: auto;
      margin-bottom: 1rem;
      margin-left: auto;
    }

.box-wrapper {
      background-color: #dcedc8;
    }

.box {
      width: 100px;
      height: 100px;
      background-color: #8bc34a;
    }

.translating {
      transform: translateX(300px);
      transition: transform 3s ease-in-out 0.5s;
    }

.controls {
      margin-bottom: 1rem;
      text-align: center;
    }

.logs {
      min-height: 100px;
      padding: 20px 15px;
      font-size: 14px;
      font-family: monospace;
      background-color: #fff9c4;
    }
  </style>
</head>

<body>

<div class="box-wrapper container">
    <div class="box"></div>
  </div>
  <div class="controls container">
    <button type="button" class="start">start</button>
    <button type="button" class="stop" disabled>stop</button>
  </div>
  <div class="logs container"></div>

</html>