sp-codes.de/bower_components/foundation-sites/scss/components/_slider.scss

// Foundation for Sites by ZURB
// foundation.zurb.com
// Licensed under MIT Open Source

// [TODO] Check how plugin confirms disabled or vertical status
// [TODO] Check if transition: all; is necessary

////
/// @group slider
////

/// Default slider width of a vertical slider. (Doesn't apply to the native slider.)
/// @type Number
$slider-width-vertical: 0.5rem !default;

/// Transition properties to apply to the slider handle and fill. (Doesn't apply to the native slider.)
/// @type Transition
$slider-transition: all 0.2s ease-in-out !default;

/// Adds the general styles for sliders.
@mixin slider-container {
  position: relative;
  height: $slider-height;
  margin-top: 1.25rem;
  margin-bottom: 2.25rem;
  background-color: $slider-background;
  cursor: pointer;
  user-select: none;
  touch-action: none;
}

/// Adds the general styles for active fill for sliders.
@mixin slider-fill {
  position: absolute;
  top: 0;
  left: 0;
  display: inline-block;
  max-width: 100%;
  height: $slider-height;
  background-color: $slider-fill-background;
  transition: $slider-transition;

  &.is-dragging {
    transition: all 0s linear;
  }
}

/// Adds the general styles for the slider handles.
@mixin slider-handle {
  @include disable-mouse-outline;
  @include vertical-center;
  position: absolute;
  left: 0;
  z-index: 1;
  display: inline-block;
  width: $slider-handle-width;
  height: $slider-handle-height;
  background-color: $slider-handle-background;
  transition: $slider-transition;
  touch-action: manipulation;
  border-radius: $slider-radius;

  &:hover {
    background-color: scale-color($slider-handle-background, $lightness: -15%);
  }

  &.is-dragging {
    transition: all 0s linear;
  }
}

@mixin slider-disabled {
  opacity: $slider-opacity-disabled;
  cursor: not-allowed;
}

@mixin slider-vertical {
  display: inline-block;
  width: $slider-width-vertical;
  height: 12.5rem;
  margin: 0 1.25rem;
  transform: scale(1, -1);

  .slider-fill {
    top: 0;
    width: $slider-width-vertical;
    max-height: 100%;
  }

  .slider-handle {
    position: absolute;
    top: 0;
    left: 50%;
    width: $slider-handle-height;
    height: $slider-handle-width;
    transform: translateX(-50%);
  }
}

@mixin foundation-slider {
  // Container
  .slider {
    @include slider-container;
  }

  // Fill area
  .slider-fill {
    @include slider-fill;
  }

  // Draggable handle
  .slider-handle {
    @include slider-handle;
  }

  // Disabled state
  .slider.disabled,
  .slider[disabled] {
    @include slider-disabled;
  }

  // Vertical slider
  .slider.vertical {
    @include slider-vertical;
  }

  // RTL support
  @if $global-text-direction == rtl {
    .slider:not(.vertical) {
      transform: scale(-1, 1);
    }
  }
}