<a href="#" class="button-main">
  Submit
  <i class="fa fa-arrow-right button-icon button-icon-default" aria-hidden="true"></i>
</a>
body {
  background: #212121;
  font-family: 'Roboto', sans-serif;
  margin: 0;
}

.button-main {
  color: black;
  text-decoration: none;
  cursor: pointer;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  margin: auto;
  background: #00C853;
  border-radius: 5px;
  border: none;
  outline: none;
  font-size: 14px;
  text-align: center;
  line-height: 1.1;
  text-transform: uppercase;
  position: absolute;
  padding: 16px 35px 16px 20px;
  font-weight: 600;
  width: 54px;
  height: 16px;
}

.button-icon {
  z-index: 1;
  background: #00C853;
  box-shadow: 0px 0px 0px 5px #212121;
  position: absolute;
  border-radius: 4px;
  right: 0;
  top: 0;
  padding: 6px 8px;
  transition: .18s;
}

.button-icon-default {
  margin: 11px -9px 11px 0px;
}

.button-icon-hover {
  margin: 11px -11px 11px 0px;
}
$(".button-main").mouseover(function() {
  $(".button-icon")
    .addClass("button-icon-hover")
    .removeClass("button-icon-default");
});

$(".button-main").mouseleave(function() {
  $(".button-icon")
    .addClass("button-icon-default")
    .removeClass("button-icon-hover");
});

External CSS

  1. https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js