JSFiddle - React, Tailwind, and code Playground

by Laurent Dufour

HTML

<div class="test">
  <input type="text">
</div>

CSS

.test {
  border:2px solid #000;
  position:relative;
  display:inline-block;
  box-sizing: border-box;
}
 .test input {
   border: 0;
 }

.test::before {
  content: "";
  position:absolute;
  top: 100%;
  left: 0;
  height: 10px;
  width: 100%;
  background: yellow;
  border: 2px solid #000;
  border-top: none;
  border-right: none;
  transform-origin: top left;
  transform: translate(-2px, 2px) skewX(45deg);
}
.test::after {
  content: "";
  position:absolute;
  top: 0;
  left: 100%;
  height: 100%;
  width: 8px;
  background: yellow;
  border: 2px solid #000;
  border-bottom: none;
  border-left: none;
  transform-origin: top left;
  transform: translate(2px, -2px) skewY(55deg);
}