grafana/public/sass/components/_tether_drop.scss

@mixin tether($themePrefix: "tether") {
  .#{ $themePrefix }-element, .#{ $themePrefix }-element * {
    &, &:after, &:before {
      box-sizing: border-box;
    }
  }

  .#{ $themePrefix }-element {
    position: absolute;
    display: none;
  }

  &.#{ $themePrefix }-open {
    display: block;
  }
}

@mixin tether-theme-arrows($themePrefix: "tether", $themeName: "arrows", $arrowSize: 16px, $arrowPointerEvents: null, $backgroundColor: #fff, $color: inherit, $useDropShadow: false) {
  .#{ $themePrefix }-element.#{ $themePrefix }-theme-#{ $themeName } {
    max-width: 100%;
    max-height: 100%;

    .#{ $themePrefix }-content {
      border-radius: 5px;
      position: relative;
      font-family: inherit;
      background: $backgroundColor;
      color: $color;
      padding: 1em;
      font-size: 1.1em;
      line-height: 1.5em;

      @if $useDropShadow {
        transform: translateZ(0);
        filter: drop-shadow(0 1px 4px rgba(0, 0, 0, .2));
      }

      &:before {
        content: "";
        display: block;
        position: absolute;
        width: 0;
        height: 0;
        border-color: transparent;
        border-width: $arrowSize;
        border-style: solid;
        pointer-events: $arrowPointerEvents;
      }
    }

    // Centers and middles

    &.#{ $themePrefix }-element-attached-bottom.#{ $themePrefix }-element-attached-center .#{ $themePrefix }-content {
      margin-bottom: $arrowSize;

      &:before {
        top: 100%;
        left: 50%;
        margin-left: - $arrowSize;
        border-top-color: $backgroundColor;
      }
    }

    &.#{ $themePrefix }-element-attached-top.#{ $themePrefix }-element-attached-center .#{ $themePrefix }-content {
      margin-top: $arrowSize;

      &:before {
        bottom: 100%;
        left: 50%;
        margin-left: - $arrowSize;
        border-bottom-color: $backgroundColor;
      }
    }

    &.#{ $themePrefix }-element-attached-right.#{ $themePrefix }-element-attached-middle .#{ $themePrefix }-content {
      margin-right: $arrowSize;

      &:before {
        left: 100%;
        top: 50%;
        margin-top: - $arrowSize;
        border-left-color: $backgroundColor;
      }
    }

    &.#{ $themePrefix }-element-attached-left.#{ $themePrefix }-element-attached-middle .#{ $themePrefix }-content {
      margin-left: $arrowSize;

      &:before {
        right: 100%;
        top: 50%;
        margin-top: - $arrowSize;
        border-right-color: $backgroundColor;
      }
    }

    // Target middle/center, element corner

    &.#{ $themePrefix }-element-attached-left.#{ $themePrefix }-target-attached-center .#{ $themePrefix }-content {
      left: - $arrowSize * 2;
    }

    &.#{ $themePrefix }-element-attached-right.#{ $themePrefix }-target-attached-center .#{ $themePrefix }-content {
      left: $arrowSize * 2;
    }

    &.#{ $themePrefix }-element-attached-top.#{ $themePrefix }-element-attached-left.#{ $themePrefix }-target-attached-middle .#{ $themePrefix }-content {
      margin-top: $arrowSize;

      &:before {
        bottom: 100%;
        left: $arrowSize;
        border-bottom-color: $backgroundColor;
      }
    }

    &.#{ $themePrefix }-element-attached-top.#{ $themePrefix }-element-attached-right.#{ $themePrefix }-target-attached-middle .#{ $themePrefix }-content {
      margin-top: $arrowSize;

      &:before {
        bottom: 100%;
        right: $arrowSize;
        border-bottom-color: $backgroundColor;
      }
    }

    &.#{ $themePrefix }-element-attached-bottom.#{ $themePrefix }-element-attached-left.#{ $themePrefix }-target-attached-middle .#{ $themePrefix }-content {
      margin-bottom: $arrowSize;

      &:before {
        top: 100%;
        left: $arrowSize;
        border-top-color: $backgroundColor;
      }
    }

    &.#{ $themePrefix }-element-attached-bottom.#{ $themePrefix }-element-attached-right.#{ $themePrefix }-target-attached-middle .#{ $themePrefix }-content {
      margin-bottom: $arrowSize;

      &:before {
        top: 100%;
        right: $arrowSize;
        border-top-color: $backgroundColor;
      }
    }

    // Top and bottom corners
    &.#{ $themePrefix }-element-attached-top.#{ $themePrefix }-element-attached-left.#{ $themePrefix }-target-attached-bottom .#{ $themePrefix }-content {
      margin-top: $arrowSize;

      &:before {
        bottom: 100%;
        left: $arrowSize;
        border-bottom-color: $backgroundColor;
      }
    }

    &.#{ $themePrefix }-element-attached-top.#{ $themePrefix }-element-attached-right.#{ $themePrefix }-target-attached-bottom .#{ $themePrefix }-content {
      margin-top: $arrowSize;

      &:before {
        bottom: 100%;
        right: $arrowSize;
        border-bottom-color: $backgroundColor;
      }
    }

    &.#{ $themePrefix }-element-attached-bottom.#{ $themePrefix }-element-attached-left.#{ $themePrefix }-target-attached-top .#{ $themePrefix }-content {
      margin-bottom: $arrowSize;

      &:before {
        top: 100%;
        left: $arrowSize;
        border-top-color: $backgroundColor;
      }
    }

    &.#{ $themePrefix }-element-attached-bottom.#{ $themePrefix }-element-attached-right.#{ $themePrefix }-target-attached-top .#{ $themePrefix }-content {
      margin-bottom: $arrowSize;

      &:before {
        top: 100%;
        right: $arrowSize;
        border-top-color: $backgroundColor;
      }
    }

    // Side corners
    &.#{ $themePrefix }-element-attached-top.#{ $themePrefix }-element-attached-right.#{ $themePrefix }-target-attached-left .#{ $themePrefix }-content {
      margin-right: $arrowSize;

      &:before {
        top: $arrowSize;
        left: 100%;
        border-left-color: $backgroundColor;
      }
    }

    &.#{ $themePrefix }-element-attached-top.#{ $themePrefix }-element-attached-left.#{ $themePrefix }-target-attached-right .#{ $themePrefix }-content {
      margin-left: $arrowSize;

      &:before {
        top: $arrowSize;
        right: 100%;
        border-right-color: $backgroundColor;
      }
    }

    &.#{ $themePrefix }-element-attached-bottom.#{ $themePrefix }-element-attached-right.#{ $themePrefix }-target-attached-left .#{ $themePrefix }-content {
      margin-right: $arrowSize;

      &:before {
        bottom: $arrowSize;
        left: 100%;
        border-left-color: $backgroundColor;
      }
    }

    &.#{ $themePrefix }-element-attached-bottom.#{ $themePrefix }-element-attached-left.#{ $themePrefix }-target-attached-right .#{ $themePrefix }-content {
      margin-left: $arrowSize;

      &:before {
        bottom: $arrowSize;
        right: 100%;
        border-right-color: $backgroundColor;
      }
    }
  }
}

$themePrefix: "drop";
$themeName: "arrows-bounce-dark";
$arrowSize: 12px;
$backgroundColor: #000;
$color: #fff;
$useDropShadow: false;
$attachmentOffset: $arrowSize;
$easing: cubic-bezier(0, 0, 0.265, 1.55);

@include tether($themePrefix: $themePrefix);
@include tether-theme-arrows($themePrefix: $themePrefix, $themeName: $themeName, $arrowSize: $arrowSize, $backgroundColor: $backgroundColor, $color: $color, $useDropShadow: $useDropShadow);


// +drop-animation-scale($themePrefix: $themePrefix, $themeName: $themeName, $attachmentOffset: $attachmentOffset, $easing: $easing)