CSS图片轮播平滑过渡技巧

<div class="carousel">
  <img src="image1.jpg" class="carousel-item active" />
  <img src="image2.jpg" class="carousel-item" />
  <img src="image3.jpg" class="carousel-item" />
</div>

.carousel {
  position: relative;
  width: 500px;
  height: 300px;
  overflow: hidden;
}
<p>.carousel-item {
position: absolute;
width: 100%;
height: 100%;
opacity: 0;
transition: opacity 0.5s ease-in-out;
}</p><p>.carousel-item.active {
opacity: 1;
}</p>

let index = 0;
const items = document.querySelectorAll('.carousel-item');
setInterval(() => {
  items[index].classList.remove('active');
  index = (index + 1) % items.length;
  items[index].classList.add('active');
}, 3000);

<div class="carousel-slide">
  <div class="carousel-inner">
    <img src="image1.jpg" />
    <img src="image2.jpg" />
    <img src="image3.jpg" />
  </div>
</div>

.carousel-slide {
  width: 500px;
  height: 300px;
  overflow: hidden;
}
<p>.carousel-inner {
display: flex;
width: 300%;
transition: transform 0.6s ease-in-out;
transform: translateX(0);
}</p><p>.carousel-inner.next {
transform: translateX(-50%); /<em> 切换到第二张 </em>/
}</p><p>.carousel-inner.prev {
transform: translateX(-100%);
}</p>