index/assets/styles/transitions.scss

.page {
  &-enter-active,
  &-leave-active {
    transition: all 0.15s;
  }

  &-enter-from,
  &-leave-to {
    opacity: 0;
    filter: blur(1em);
  }
}

.expand-enter-active,
.expand-leave-active {
  transition-property: opacity, height;
}

.expand-enter,
.expand-leave-to {
  opacity: 0;
}