animate.css/source/zooming_exits/zoomOut.css

@keyframes zoomOut {
  from {
    opacity: 1;
  }

  50% {
    opacity: 0;
    transform: scale3d(.3, .3, .3);
  }

  to {
    opacity: 0;
  }
}

.zoomOut {
  animation-name: zoomOut;
}