Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.4.4)
// Compass (v1.0.1)
// ----

//
//    use this together with modernizr feature detection
//
@mixin supports-feature($feature) {
    .#{$feature} & {
        @content;
    }
}

@mixin not-supports-feature($feature) {
    .no-#{$feature} & {
        @content;
    }
}

div {
  @include supports-feature('touch') {
    width: 50px;
  }
  @include not-supports-feature('touch') {
    width: 30px;
  }
}

SassMeister-output.css

.touch div {
  width: 50px;
}
.no-touch div {
  width: 30px;
}