JSFiddle - React, Tailwind, and code Playground

HTML

<div></div>

CSS

div{
  width: 150px;
  height: 100px;  
  -webkit-clip-path: polygon(0 60%, 100% 0, 100% 100%, 0% 100%);
  clip-path: polygon(0 60%, 100% 0, 100% 100%, 0% 100%);
  background: #000;
}