animate.css/source/bouncing_exits/bounceOutLeft.css

@keyframes bounceOutLeft {
  20% {
    opacity: 1;
    transform: translate3d(20px, 0, 0) scaleX(0.9);
  }

  to {
    opacity: 0;
    transform: translate3d(-2000px, 0, 0) scaleX(2);
  }
}

.bounceOutLeft {
  animation-name: bounceOutLeft;
}