HTML

<h1>CSS-only Carousel</h1>

<p>This carousel is created with HTML and CSS only.</p>

<section class="carousel" aria-label="Gallery">
  <ol class="carousel__viewport">
    <li id="carousel__slide1"
        tabindex="0"
        class="carousel__slide">
      <div class="carousel__snapper">
        <a href="#carousel__slide4"
           class="carousel__prev">Go to last slide</a>
        <a href="#carousel__slide2"
           class="carousel__next">Go to next slide</a>
      </div>
    </li>
    <li id="carousel__slide2"
        tabindex="0"
        class="carousel__slide">
      <div class="carousel__snapper"></div>
      <a href="#carousel__slide1"
         class="carousel__prev">Go to previous slide</a>
      <a href="#carousel__slide3"
         class="carousel__next">Go to next slide</a>
    </li>
    <li id="carousel__slide3"
        tabindex="0"
        class="carousel__slide">
      <div class="carousel__snapper"></div>
      <a href="#carousel__slide2"
         class="carousel__prev">Go to previous slide</a>
      <a href="#carousel__slide4"
         class="carousel__next">Go to next slide</a>
    </li>
    <li id="carousel__slide4"
        tabindex="0"
        class="carousel__slide">
      <div class="carousel__snapper"></div>
      <a href="#carousel__slide3"
         class="carousel__prev">Go to previous slide</a>
      <a href="#carousel__slide1"
         class="carousel__next">Go to first slide</a>
    </li>
  </ol>
  <aside class="carousel__navigation">
    <ol class="carousel__navigation-list">
      <li class="carousel__navigation-item">
        <a href="#carousel__slide1"
           class="carousel__navigation-button">Go to slide 1</a>
      </li>
      <li class="carousel__navigation-item">
        <a href="#carousel__slide2"
           class="carousel__navigation-button">Go to slide 2</a>
      </li>
      <li class="carousel__navigation-item">
        <a href="#carousel__slide3"
           class="carousel__navigation-button">Go to slide 3</a>
      </li>
      <li class="carousel__navigation-item">
        <a href="#carousel__slide4"
           class="carousel__navigation-button">Go to slide 4</a>
      </li>
    </ol>
  </aside>
</section>

CSS

@keyframes tonext {
  75% {
    left: 0;
  }
  95% {
    left: 100%;
  }
  98% {
    left: 100%;
  }
  99% {
    left: 0;
  }
}

@keyframes tostart {
  75% {
    left: 0;
  }
  95% {
    left: -300%;
  }
  98% {
    left: -300%;
  }
  99% {
    left: 0;
  }
}

@keyframes snap {
  96% {
    scroll-snap-align: center;
  }
  97% {
    scroll-snap-align: none;
  }
  99% {
    scroll-snap-align: none;
  }
  100% {
    scroll-snap-align: center;
  }
}

body {
  max-width: 37.5rem;
  margin: 0 auto;
  padding: 0 1.25rem;
  font-family: 'Lato', sans-serif;
}

* {
  box-sizing: border-box;
  scrollbar-color: transparent transparent; /* thumb and track color */
  scrollbar-width: 0px;
}

*::-webkit-scrollbar {
  width: 0;
}

*::-webkit-scrollbar-track {
  background: transparent;
}

*::-webkit-scrollbar-thumb {
  background: transparent;
  border: none;
}

* {
  -ms-overflow-style: none;
}

ol, li {
  list-style: none;
  margin: 0;
  padding: 0;
}

.carousel {
  position: relative;
  padding-top: 75%;
  filter: drop-shadow(0 0 10px #0003);
  perspective: 100px;
}

.carousel__viewport {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  display: flex;
  overflow-x: scroll;
  counter-reset: item;
  scroll-behavior: smooth;
  scroll-snap-type: x mandatory;
}

.carousel__slide {
  position: relative;
  flex: 0 0 100%;
  width: 100%;
  background-color: #f99;
  counter-increment: item;
}

.carousel__slide:nth-child(even) {
  background-color: #99f;
}

.carousel__slide:before {
  content: counter(item);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate3d(-50%,-40%,70px);
  color: #fff;
  font-size: 2em;
}

.carousel__snapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  scroll-snap-align: center;
}

@media (hover: hover) {
  .carousel__snapper {
    animation-name: tonext, snap;
    animation-timing-function: ease;
    animation-duration: 4s;
    animation-iteration-count: infinite;
  }

  .carousel__slide:last-child .carousel__snapper {
    animation-name: tostart, snap;
  }
}

@media (prefers-reduced-motion: reduce) {
  .carousel__snapper {
    animation-name: none;
  }
}

.carousel:hover .carousel__snapper,
.carousel:focus-within .carousel__snapper {
  animation-name: none;
}

.carousel__navigation {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  text-align: center;
}

.carousel__navigation-list,
.carousel__navigation-item {
  display: inline-block;
}

.carousel__navigation-button {
  display: inline-block;
  width: 1.5rem;
  height: 1.5rem;
  background-color: #333;
  background-clip: content-box;
  border: 0.25rem solid transparent;
  border-radius: 50%;
  font-size: 0;
  transition: transform 0.1s;
}

.carousel::before,
.carousel::after,
.carousel__prev,
.carousel__next {
  position: absolute;
  top: 0;
  margin-top: 37.5%;
  width: 4rem;
  height: 4rem;
  transform: translateY(-50%);
  border-radius: 50%;
  font-size: 0;
  outline: 0;
}

.carousel::before,
.carousel__prev {
  left: -1rem;
}

.carousel::after,
.carousel__next {
  right: -1rem;
}

.carousel::before,
.carousel::after {
  content: '';
  z-index: 1;
  background-color: #333;
  background-size: 1.5rem 1.5rem;
  background-repeat: no-repeat;
  background-position: center center;
  color: #fff;
  font-size: 2.5rem;
  line-height: 4rem;
  text-align: center;
  pointer-events: none;
}

.carousel::before {
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpolygon points='0,50 80,100 80,0' fill='%23fff'/%3E%3C/svg%3E");
}

.carousel::after {
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpolygon points='100,50 20,100 20,0' fill='%23fff'/%3E%3C/svg%3E");
}

Kết quả:

Bài viết gốc:

CSS-Only Carousel

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