@if $use-bounce == true
  @-webkit-keyframes bounce
    0%, 20%, 50%, 80%, 100%
      -webkit-transform: translateY(0)

    40%
      -webkit-transform: translateY(-$base-distance * 3)

    60%
      -webkit-transform: translateY(-$base-distance * 1.5)

  @keyframes bounce
    0%, 20%, 50%, 80%, 100%
      transform: translateY(0)

    40%
      transform: translateY(-$base-distance * 3)

    60%
      transform: translateY(-$base-distance * 1.5)

  .bounce
    +animate-prefixer(animation-name, bounce)