JSFiddle - React, Tailwind, and code Playground

by luka kupunia

HTML

<div></div>

CSS

div {
  width: 400px;
  height: 200px;
  background: red;
  margin: 70px auto;
  -webkit-clip-path: polygon(69% 0, 83% 0, 83% 100%, 69% 100%);
  clip-path: polygon(69% 0, 83% 0, 83% 100%, 69% 100%);
  animation: a linear 1s forwards;
}
@keyframes a {
  from {
    opacity: 0;
    -webkit-clip-path: polygon(69% 0, 83% 0, 83% 100%, 69% 100%);
    clip-path: polygon(69% 0, 83% 0, 83% 100%, 69% 100%);
  }
  40% {
    -webkit-clip-path: polygon(41% 0, 83% 0, 90% 100%, 41% 100%);
    clip-path: polygon(41% 0, 83% 0, 90% 100%, 41% 100%);
  }
  100% {
    -webkit-clip-path: polygon(41% 0, 83% 0, 100% 100%, 0 100%);
    clip-path: polygon(41% 0, 83% 0, 100% 100%, 0 100%);
    opacity: 1;
  }
}