<header>
  <h2 class="title">animation</h2>
  <p class="description">Застосовує анімацію, визначену в CSS, до елемента.</p>
</header>
<main>
  <div class="result">
    <div class="animated-element">Це анімований елемент</div>
    <div class="controls">
      <button id="playAnimation">Запустити анімацію</button>
      <button id="pauseAnimation">Призупинити анімацію</button>
      <select id="animationSelect">
        <option value="slideIn">Анімація слайду</option>
        <option value="fadeIn">Анімація появи</option>
        <option value="bounce">Анімація відскоку</option>
      </select>
    </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);
}

.animated-element {
  width: 200px;
  height: 200px;
  background-color: lightgray;
  margin-bottom: 20px;
}

@keyframes slideIn {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(0);
  }
}

@keyframes fadeIn {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}

@keyframes bounce {
  0% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px);
  }
  100% {
    transform: translateY(0);
  }
}
const animatedElement = document.querySelector('.animated-element');
const playButton = document.getElementById('playAnimation');
const pauseButton = document.getElementById('pauseAnimation');
const animationSelect = document.getElementById('animationSelect');

let animation;

playButton.addEventListener('click', () => {
  const animationName = animationSelect.value;
  animation = animatedElement.animate(
    [
      { transform: 'none' },
      { transform: 'none' }
    ],
    {
      duration: 1000,
      iterations: Infinity,
      easing: 'ease-in-out',
      direction: 'alternate'
    }
  );
  animatedElement.style.animation = `${animationName} 1s infinite`;
});

pauseButton.addEventListener('click', () => {
  if (animation) {
    animation.cancel();
    animatedElement.style.animation = 'none';
  }
});

animationSelect.addEventListener('change', () => {
  if (animation) {
    animation.cancel();
  }
  const animationName = animationSelect.value;
  animatedElement.style.animation = `${animationName} 1s infinite`;
});

External CSS

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External JavaScript

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