body {
  opacity: 0;
}

.revealElem {
  overflow: hidden;
  position: relative;
}
.revealElem::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #ffffff;
  transform: translateX(0);
  transition: transform 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  z-index: 1;
}
.revealElem.reveal::before {
  transform: translateX(100%);
}