HTMLify

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: #fef9f2;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  overflow: hidden;
}

.container {
  position: relative;
  width: 60vw;
  height: 80vh;
}

.img-container-before,
.img-container-after {
  position: absolute;
  width: 60vw;
  height: 80vh;
}

.img-container-before {
  width: 30vw;
  overflow: hidden;
}

img {
  width: 60vw;
  height: 80vh;
  object-fit: cover;
}

.slider {
  width: 0.5rem;
  background: white;
  height: 100%;
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  pointer-events: none;
}