app/assets/stylesheets/modules/_social-count.css.scss

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@mixin gap($color) {
  content: "";
  display: block;
  width: 0;
  height: 0;
  border: 6px solid $color;
  border-color: transparent $color transparent transparent;
  position: absolute;
  right: 100%;
  top: 50%;
  margin-top: -6px;
}
@mixin social-count($background-color, $border-color) {
  position: relative;
  display: inline-block;
  padding: 0 7px 0;
  margin-left: 8px;
  font-size: $baseFontSize;
  font-weight: bold;
  line-height: 28px;
  color: $grayDark;
  vertical-align: middle;
  background-color: $background-color;
  border: 1px solid $btnBorder;
  border-radius: 3px;
  &:before {
    @include gap($btnBorder);
    margin-right: 0;
  }
  &:after {
    @include gap($background-color);
    margin-right: -1px;
  }
}