.box-enter {
  opacity: 0;
  transform: scale(0.3)
}
.box-enter-active {
  opacity: 1;
  transform: scale(1);
  transition: all 300ms;
}

.box-exit {
  opacity: 1;
  transform: scale(1);
}

.box-exit-active {
  opacity: 0;
  transform: scale(.3);
  transition: all 300ms
}

//xx

.overflow-enter {
  opacity: 0;
}
.overflow-enter-active {
  opacity: 1;
  transition: all 300ms;
}
.overflow-exit {
  opacity: 1;
}
.overflow-exit-active {
  opacity: 0;
  transition: all 300ms
}