angular/angular.js

<style>
  [ng-cloak] { display: none !important; }
  .animation-container .ng-enter,
  .animation-container .ng-leave {
    transition: all 0.1s;
  }

  .animation-container .ng-enter,
  .animation-container .ng-leave.ng-leave-active {
    opacity: 0;
  }

  .animation-container .ng-enter.ng-enter-active,
  .animation-container .ng-leave {
    opacity: 1;
  }
</style>
<div ng-app="animationBenchmark" ng-cloak ng-controller="BenchmarkController as bm">
  <div class="container-fluid">
    <h2>Large collection of elements animated in and out with ngAnimate</h2>

    <div class="animation-container">
      <div ng-repeat="i in bm.items track by $index">
        Just a plain ol' element
      </div>
    </div>
  </div>
</div>