将CSS动画应用于数组的每个元素

<div class="container">
  <div class="item">元素1</div>
  <div class="item">元素2</div>
  <div class="item">元素3</div>
  <div class="item">元素4</div>
</div>

.container {
  display: flex;
}

.item {
  width: 100px;
  height: 100px;
  background-color: blue;
  margin: 10px;
  animation: fade-in 1s ease-in-out forwards;
}

@keyframes fade-in {
  0% {
    opacity: 0;
    transform: scale(0.5);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

.item:nth-child(2) {
  animation-delay: 0.2s;
}

.item:nth-child(3) {
  animation-delay: 0.4s;
}

.item:nth-child(4) {
  animation-delay: 0.6s;
}