code: function absolute(rem){return{abs:{position:'absolute'},
  top0:{top:0},
  right0:{right:0},
  bottom0:{bottom:0},
  left0:{left:0},
  
  top1:{top:1*rem},
  right1:{right:1*rem},
  bottom1:{bottom:1*rem},
  left1:{left:1*rem},
  
  top2:{top:2*rem},
  right2:{right:2*rem},
  bottom2:{bottom:2*rem},
  left2:{left:2*rem},
  
  top3:{top:3*rem},
  right3:{right:3*rem},
  bottom3:{bottom:3*rem},
  left3:{left:3*rem},
  
  top4:{top:4*rem},
  right4:{right:4*rem},
  bottom4:{bottom:4*rem},
  left4:{left:4*rem},
  
  z1:{zIndex:1,elevation:1},
  z2:{zIndex:2,elevation:2},
  z3:{zIndex:4,elevation:4},
  z4:{zIndex:8,elevation:8}};
  
  }
docs: Generate absolute position classes