Generated by SassMeister.com.

SassMeister-input.scss

// ----
// libsass (v3.2.5)
// ----

@import "bourbon/bourbon";

@mixin reset-bourbon-prefix-vars {
  @if type-of-value($prefix-for-webkit) {
    $prefix-for-webkit:    false !global;
    $prefix-for-mozilla:   false !global;
    $prefix-for-microsoft: false !global;
    $prefix-for-opera:     false !global;
    $prefix-for-spec:      true !global;
  }
}

@include reset-bourbon-prefix-vars;

@mixin bourbon-prefix-support ($webkit: null, $moz: null, $ms: null, $o: null, $spec: null) {
  $prefix-for-webkit:    $webkit !global;
  $prefix-for-mozilla:   $moz !global;
  $prefix-for-microsoft: $ms !global;
  $prefix-for-opera:     $o !global;
  $prefix-for-spec:      $spec !global;
  @content;
  @include reset-bourbon-prefix-vars;
}

@include bourbon-prefix-support ($spec: true, $webkit: true) {
  @include keyframes(fadeIn) {
    0% {
      opacity: 0;
      @include transform(translateY(50px));
    }
  }
}

@include bourbon-prefix-support ($spec: true, $webkit: true, $ms: true, $moz: true) {
  block {
    @include user-select(none);
  }
}

foobar {
  @include user-select(none);
}

SassMeister-output.css

@-webkit-keyframes fadeIn {
  0% {
    opacity: 0;
    -webkit-transform: translateY(50px);
  }
}

@keyframes fadeIn {
  0% {
    opacity: 0;
    -webkit-transform: translateY(50px);
    transform: translateY(50px);
  }
}

block {
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

foobar {
  user-select: none;
}