.btn-enter,.btn-appear {
  opacity: 0;
  transform: translateX(100%)
}

.btn-enter-active,.btn-enter-active {
  opacity: 1;
  transform: translateX(0);
  transition: all 1s ease
}
.btn-exit {
  opacity: 1;
  transform: translateX(0)
}
.btn-exit-active {
  opacity: 0;
  transform: translateX(-100%);
  transition: all 1s ease
}