Gist For pseudo element

pesudo.scss

@mixin br-sudo-elemet( $width: null, $height:null, $t:null, $l:null, $b:null, $r:null, $z:null ){
  content: " ";
  position: absolute;
  @if($w) { width: $w ; }
  @if($h) { height: $h ; }
  @if($z) { z-index: $z ; }
  @if($t) { top : $t ;}
  @if($b) { bottom :$b ;}
  @if($l) { left : $l ;}
  @if($r) { right : $r ;}
}