<header>
  <h2 class="title">element.style.display</h2>
  <p class="description">Змінює видимість HTML-елемента.</p>
</header>
<main>
  <div class="result">
    <button id="toggleButton1">Перемкнути блок 1</button>
    <button id="toggleButton2">Перемкнути блок 2</button>
    <button id="toggleButton3">Перемкнути блок 3</button>
    <div id="block1" class="content-block">Це блок 1</div>
    <div id="block2" class="content-block">Це блок 2</div>
    <div id="block3" class="content-block">Це блок 3</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);
}

.content-block {
  padding: 10px;
  margin: 10px 0;
  background-color: #e2e2e2;
  -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);
}

document.getElementById('toggleButton1').addEventListener('click', function() {
  let block = document.getElementById('block1');
  if (block.style.display === 'none') {
    block.style.display = 'block';
  } else {
    block.style.display = 'none';
  }
});

document.getElementById('toggleButton2').addEventListener('click', function() {
  let block = document.getElementById('block2');
  if (block.style.display === 'none') {
    block.style.display = 'block';
  } else {
    block.style.display = 'none';
  }
});

document.getElementById('toggleButton3').addEventListener('click', function() {
  let block = document.getElementById('block3');
  if (block.style.display === 'none') {
    block.style.display = 'block';
  } else {
    block.style.display = 'none';
  }
});

External CSS

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External JavaScript

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