Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.4.12)
// Compass (v1.0.3)
// ----

@mixin fadeIn($direction: none) {
  $type:'';

  @if $direction == 'right' {
    $type: fadeInRight;
  } @else {
    $type: fadeIn;
  }
  
  -webkit-animation-name: $type;
  animation-name: $type;
}
 
.foo {
  @include fadeIn();
} 

SassMeister-output.css

.foo {
  -webkit-animation-name: fadeIn;
  animation-name: fadeIn;
}