.parallax-container {
  position: relative;
  height: 100vh;
  overflow-y: scroll;
}

.parallax-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
}

@supports (-webkit-overflow-scrolling: touch) {
  .parallax-image {
    background-attachment: scroll;
  }
}