@mixin popover-direction($popover-arrow-width, $arrow-distance, $bg) {
  &[x-placement^="top"] {
    padding-bottom: $popover-arrow-width;
  }

  &[x-placement^="right"] {
    padding-left: $popover-arrow-width;
  }

  &[x-placement^="bottom"] {
    padding-top: $popover-arrow-width;
  }

  &[x-placement^="left"] {
    padding-right: $popover-arrow-width;
  }
  &[x-placement^="top"] &-arrow {
    bottom: $popover-arrow-outer-width;
    border-color: transparent #fff #fff transparent;
    box-shadow: 3px 3px 7px rgba(0, 0, 0, .15);
    transform: translateX(-50%) rotate(45deg);
  }
  &[x-placement="top"] &-arrow {
    left: 50%;
  }

  &[x-placement="top-start"] &-arrow {
    left: 16px;
  }

  &[x-placement="top-end"] &-arrow {
    right: 16px;
  }

  &[x-placement^="right"] &-arrow {
    left: $popover-arrow-outer-width;
    border-color: transparent transparent #fff #fff;
    box-shadow: -3px 3px 7px rgba(0, 0, 0, .15);
  }

  &[x-placement="right"] &-arrow {
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
  }

  &[x-placement="right-start"] &-arrow {
    top: $popover-arrow-outer-width * 2;
  }

  &[x-placement="right-end"] &-arrow {
    bottom: $popover-arrow-outer-width * 2;
  }

  &[x-placement^="left"] &-arrow {
    right: $popover-arrow-outer-width;
    border-color: #fff #fff transparent transparent;
    box-shadow: 3px -3px 7px rgba(0, 0, 0, .15);
  }

  &[x-placement="left"] &-arrow {
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
  }

  &[x-placement="left-start"] &-arrow {
    top: $popover-arrow-outer-width * 2;
  }

  &[x-placement="left-end"] &-arrow {
    bottom: $popover-arrow-outer-width * 2;
  }

  &[x-placement^="bottom"] &-arrow {
    top: $popover-arrow-outer-width;
    border-color: #fff transparent transparent #fff;
    box-shadow: -3px -3px 7px rgba(0, 0, 0, .15);
  }

  &[x-placement="bottom"] &-arrow {
    left: 50%;
    transform: translateX(-50%) rotate(45deg);
  }

  &[x-placement="bottom-start"] &-arrow {
    left: 16px;
  }

  &[x-placement="bottom-end"] &-arrow {
    right: 16px;
  }
}