<a href="#">Link Hover</a>

@import url('https://fonts.googleapis.com/css?family=Barlow:800&display=swap');

* {
  box-sizing: border-box;
  &::before, &::after {
    box-sizing: border-box;
  }
}

body {
  font-family: 'Barlow', sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  min-height: 100vh;
}

a {
  position: relative;
  display: inline-block;
  font-size: 2em;
  font-weight: 800;
  color: royalblue;
  overflow: hidden;
  background: linear-gradient(to right, midnightblue, midnightblue 50%, royalblue 50%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 200% 100%;
  background-position: 100%;
  transition: background-position 275ms ease;
  text-decoration: none; // text decorations are clipped in WebKit browsers
  &:hover {
    background-position: 0 100%;
  }
}