<header>
  <h2 class="title">alignContent</h2>
  <p class="description">Визначає, як вирівнюються рядки всередині flex-контейнера при недостатній висоті контейнера.</p>
</header>
<main>
  <div class="controls">
    <label>
      <input type="radio" name="alignment" value="flex-start" checked> flex-start
    </label>
    <label>
      <input type="radio" name="alignment" value="flex-end"> flex-end
    </label>
    <label>
      <input type="radio" name="alignment" value="center"> center
    </label>
    <label>
      <input type="radio" name="alignment" value="space-between"> space-between
    </label>
    <label>
      <input type="radio" name="alignment" value="space-around"> space-around
    </label>
    <label>
      <input type="radio" name="alignment" value="stretch"> stretch
    </label>
  </div>
  <div class="result">
    <div class="flex-container">
      <div class="item">1</div>
      <div class="item">2</div>
      <div class="item">3</div>
      <div class="item">4</div>
      <div class="item">5</div>
      <div class="item">6</div>
      <div class="item">7</div>
      <div class="item">8</div>
    </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);
}

.flex-container {
  display: flex;
  flex-wrap: wrap;
  height: 300px;
  align-content: flex-start;
}

.item {
  background-color: #ccc;
  border: 1px solid #999;
  padding: 20px;
  width: 60px;
  text-align: center;
  margin: 5px;
}
const alignments = document.querySelectorAll('input[name="alignment"]');
const container = document.querySelector('.flex-container');

alignments.forEach(alignment => {
  alignment.addEventListener('change', () => {
    container.style.alignContent = alignment.value;
  });
});

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