.animate-if {
    background:white;
    border:1px solid black;
    padding:10px;
  }

  .animate-if.ng-enter, .animate-if.ng-leave {
    -webkit-transition:all cubic-bezier(0.250, 0.460, 0.450, 0.940) 0.5s;
    transition:all cubic-bezier(0.250, 0.460, 0.450, 0.940) 0.5s;
  }

  .animate-if.ng-enter,
  .animate-if.ng-leave.ng-leave-active {
    opacity:0;
  }

  .animate-if.ng-leave,
  .animate-if.ng-enter.ng-enter-active {
    opacity:1;
  }