vue-vben-admin/src/design/transition/scale.less

.scale-transition {
  .transition-default();

  &-enter-from,
  &-leave,
  &-leave-to {
    opacity: 0;
    transform: scale(0);
  }
}

.scale-rotate-transition {
  .transition-default();

  &-enter-from,
  &-leave,
  &-leave-to {
    opacity: 0;
    transform: scale(0) rotate(-45deg);
  }
}