I have a button and on a :hover I would like an after element to show. But I can't see it. Is it possible to have an :after element on a button?
.button {
  cursor: pointer;
  height: 30px;
}
.button-primary {
  border: none;
}
.button-primary:hover:after {
  display: block;
  position: relative;
  top: 3px;
  right: 3px;
  width: 100px;
  height: 5px;
}<button class="button button-primary">My button</button> 
     
     
    