igna.rocks/assets/js/scss/_mixins.scss

// prefix declarations
@mixin prefixed($property, $value) {
  @if $webkit == true {
    -webkit-#{$property}: #{$value};
  }

  @if $moz == true {
    -moz-#{$property}: #{$value};
  }

  @if $ms == true {
    -ms-#{$property}: #{$value};
  }

  @if $o == true {
    -o-#{$property}: #{$value};
  }

  #{$property}: #{$value};
}

// prefix keyframes
@mixin keyframes($name) {
  @if $webkit == true {
    @-webkit-keyframes #{$name} {
      @content;
    }
  }

  @if $moz == true {
    @-moz-keyframes #{$name} {
      @content;
    }
  }

  @if $ms == true {
    @-ms-keyframes #{$name} {
      @content;
    }
  }

  @if $o == true {
    @-o-keyframes #{$name} {
      @content;
    }
  }

  @keyframes #{$name} {
    @content;
  }
}