<header>
  <h2 class="title">DOMTokenList: remove() method</h2>
  <p class="description">Видаляє один або кілька класів з елемента DOM.</p>
</header>
<main>
  <div class="result">
    <div class="box highlight bordered"></div>
    <div class="controls">
      <button id="remove-highlight">Видалити клас "highlight"</button>
      <button id="remove-bordered">Видалити клас "bordered"</button>
      <button id="remove-all">Видалити всі класи</button>
    </div>
  </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);
}

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

.highlight {
  background-color: #ff0;
}

.bordered {
  border: 2px solid #000;
}
const box = document.querySelector('.box');
const removeHighlightBtn = document.getElementById('remove-highlight');
const removeBorderedBtn = document.getElementById('remove-bordered');
const removeAllBtn = document.getElementById('remove-all');

removeHighlightBtn.addEventListener('click', () => {
  box.classList.remove('highlight');
});

removeBorderedBtn.addEventListener('click', () => {
  box.classList.remove('bordered');
});

removeAllBtn.addEventListener('click', () => {
  box.classList.remove(...box.classList);
});

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.