JSFiddle - React, Tailwind, and code Playground

by Katarn

HTML

<div>

</div>

SCSS

div {
  background: red;
  height: 100px;
  width: 200px;
  position: relative;
  
  &::after {
    content: "";
    display: block;
    position: absolute;
    background: blue;
    transition: all .3s ease-in-out;
    top: 0;
    bottom: 0;
    left: 0;
    right: 50%;
  }
  
  &:hover {
    &::after {
      left: 50%;
      right: 0;
    }
  }
}