div[data-src] {
  position:relative;
}
div[data-src]:after {
  position:absolute;
  width:100%;
  height:100%;
  top:0;
  left:0;
  z-index:2;
  content:'';
  background-image:url(../img/loading.svg) !important;
  background-repeat:no-repeat !important;
  background-size:20% !important;
  background-position:center !important;
}