JSFiddle - React, Tailwind, and code Playground

by Alexey Mishin

HTML

<div id="pointer"></div>

CSS

#pointer {
    width: 200px;
    height: 40px;
    position: relative;
    background: red;
  }
  
  #pointer:after {
    content: "";
    position: absolute;
    right: -20px;
    bottom: 0;
    width: 0;
    height: 0;
    border-left: 20px solid black;
    border-top: 20px solid orange;
    border-bottom: 20px solid orange;
  }