@if $use-swing == true
  @-webkit-keyframes swing
    20%, 40%, 60%, 80%, 100%
      -webkit-transform-origin: $base-origin

    20%
      -webkit-transform: rotate(15deg)

    40%
      -webkit-transform: rotate(-10deg)

    60%
      -webkit-transform: rotate(5deg)

    80%
      -webkit-transform: rotate(-5deg)

    100%
      -webkit-transform: rotate(0deg)

  @keyframes swing
    20%
      transform: rotate(15deg)

    40%
      transform: rotate(-10deg)

    60%
      transform: rotate(5deg)

    80%
      transform: rotate(-5deg)

    100%
      transform: rotate(0deg)

  .swing
    +animate-prefixer(transform-origin, $base-origin)

    +animate-prefixer(animation-name, swing)