@include keyframes(fadeIn) {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}

@mixin fadeIn(
  $count: $countDefault,
  $duration: $durationDefault,
  $delay: $delayDefault,
  $function: $ease-out-quint,
  $fill: $fillDefault,
  $visibility: $visibilityDefault
) {
  @include animation-name(fadeIn);
  @include count($count);
  @include duration($duration);
  @include delay($delay);
  @include function($function);
  @include fill-mode($fill);
  @include visibility($visibility);
}