<div class="slider">
  <img src="https://images.unsplash.com/photo-1529257414772-1960b7bea4eb?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=1770&q=80" alt="" />
  <img src="https://images.unsplash.com/photo-1598188306155-25e400eb5078?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=1548&q=80" alt="" />
  <img src="https://images.unsplash.com/photo-1517331156700-3c241d2b4d83?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=1768&q=80" alt="" />
</div>

* {
  margin: 0;
}

body {
  align-items: center;
  display: flex;
  height: 100vh;
  justify-content: center;
  overflow: hidden;
}

.slider {
  display: flex;
  overflow-x: scroll;
  position: relative;
  scroll-snap-type: x mandatory;
  scrollbar-color: slateblue lightgray;
  scrollbar-width: thin;
  width: 480px;
}

.slider > img {
  object-fit: cover;
  scroll-snap-align: start;
  width: 100%;
}

.slider::-webkit-scrollbar {
  height: 6px;
}

.slider::-webkit-scrollbar-track {
  background-color: whitesmoke;
}

.slider::-webkit-scrollbar-thumb {
  background-color: hotpink;
}