<header>
  <h2 class="title">element.style.left</h2>
  <p class="description">Встановлює або отримує значення відступу елемента від лівого краю контейнера.</p>
</header>
<main>
  <div class="result">
    <div id="movable" class="box"></div>
    <button id="leftButton">Вліво</button>
    <button id="rightButton">Вправо</button>
  </div>
</main>

body {
  font-size: 16px;
  line-height: 1.5;
  font-family: monospace;
}

header {
  background-color: #f1f1f1;
  margin-bottom: 25px;
  padding: 15px;
  -webkit-box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
  -moz-box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
  box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
}

header h2.title {
  padding-bottom: 15px;
  border-bottom: 1px solid #999;
}

header p.description {
  font-style: italic;
  color: #222;
}

.result {
  background-color: #f8f8f8;
  padding: 15px;
  -webkit-box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
  -moz-box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
  box-shadow: 0px 0px 3px 0px rgba(118, 118, 118, 1);
  position: relative;
  height: 200px;
}

.box {
  width: 50px;
  height: 50px;
  background-color: #3498db;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  left: 0;
}

button {
  margin-top: 15px;
  padding: 10px 15px;
  border: none;
  background-color: #3498db;
  color: white;
  cursor: pointer;
}

button:hover {
  background-color: #2980b9;
}

document.getElementById('leftButton').addEventListener('click', function() {
  let box = document.getElementById('movable');
  let currentLeft = parseInt(box.style.left) || 0;
  box.style.left = (currentLeft - 10) + 'px';
});

document.getElementById('rightButton').addEventListener('click', function() {
  let box = document.getElementById('movable');
  let currentLeft = parseInt(box.style.left) || 0;
  box.style.left = (currentLeft + 10) + 'px';
});

External CSS

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External JavaScript

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