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// Tooltip

@mixin tooltip($size: 5px, $dir: left, $bgcolor: #000) {
  background: $bgcolor;
  position: relative;
  &:before {
    border-style: solid;
    content: "";
    display: block;
    position: absolute;
    @if (($dir == top) or ($dir == bottom)) {
      border-color: $bgcolor transparent;
      left: 50%;
      margin-left: -$size;
    } @else {
      border-color: transparent $bgcolor;
      margin-top: -$size;
      top: 50%;
    }
    @if ($dir == top) {
      border-width: 0 $size $size $size;
      top: -$size;
    }
    @if ($dir == right) {
      border-width: $size 0 $size $size;
      right: -$size;
    }
    @if ($dir == bottom) {
      border-width: $size $size 0 $size;
      bottom: -$size;
    }
    @if ($dir == left) {
      border-width: $size $size $size 0;
      left: -$size;
    }
  }
}


// Usage
ul {
  @include tooltip(5px, right, rgba(0, 0, 0, .8));
  width: 400px
}