Star rating using Font Awesome doesn't work properly on Edge and IE

.star-rating {
  display: inline-block;
  position: relative;
  line-height: 1;
}
.star-rating:before,
.star-rating:after {
  content: "\f005\f005\f005\f005\f005";
  display: block;
  font-family: "FontAwesome";
  font-size: 25px;
  color: #ccc;
}
.star-rating:after {
  color: gold;
  position: absolute;
  top: 0;
  left: 0;
  overflow: hidden;
}

.star-rating.s0:after {
  width: 0%;
}
.star-rating.s1:after {
  width: 10%;
}
.star-rating.s2:after {
  width: 20%;
}
.star-rating.s3:after {
  width: 30%;
}
.star-rating.s4:after {
  width: 40%;
}
.star-rating.s5:after {
  width: 50%;
}
.star-rating.s6:after {
  width: 60%;
}
.star-rating.s7:after {
  width: 70%;
}
.star-rating.s8:after {
  width: 80%;
}
.star-rating.s9:after {
  width: 90%;
}
.star-rating.s10:after {
  width: 100%;
}

<link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet"/>

<span class="star-rating s7"></span>